Add elections + demographics layer: candidates and jurisdictions

Two new entity types, built deterministically from the raw exports:

  Candidate (2,494)     — 2026 federal candidates as files under
                          us/states/<st>/candidates/, with office,
                          district, party, incumbent/challenger stance,
                          campaign committee, FEC id.

  Jurisdiction (3,494)  — demographic nodes carrying ACS 2023 data:
                          3,131 counties (deduped from 3,231 mixed-format
                          fips keys) + 363 congressional districts.

This completes the county skeleton nationwide: every US county is now a
browsable node with population, income, poverty, race, education and
housing — even where no officeholders are mapped yet. In Florida the
county index.md merges into the existing dir and reports its officeholder
count alongside demographics (St. Lucie: 33 officeholders + ACS profile).

build.py now reads seven raw inputs in one deterministic pass
(byte-identical on rerun). The mirror now answers: who holds power, who
runs this institution, who is running, and what each place is made of.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

data/jurisdictions/us/states/ma/counties/barnstable/index.md

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+---
+type: Jurisdiction
+title: "Barnstable County, MA"
+classification: county
+fips: "25001"
+state: "MA"
+demographics:
+  population: 231668
+  population_under_18: 32704
+  population_18_64: 122209
+  population_65_plus: 76755
+  median_household_income: 95241
+  poverty_rate: 7.67
+  homeownership_rate: 81.07
+  unemployment_rate: 5.02
+  median_home_value: 629000
+  gini_index: 0.4787
+  vacancy_rate: 36.36
+  race_white: 198817
+  race_black: 6467
+  race_asian: 3422
+  race_native: 1025
+  hispanic: 8561
+  bachelors_plus: 129740
+sources:
+  - field: demographics
+    source: Census ACS 2023
+confidence: official
+tags: [jurisdiction, county, ma]
+timestamp: "2026-07-03"
+---
+
+# Barnstable County, MA
+
+County jurisdiction.
+
+## Demographics (ACS 2023)
+
+| Measure | Value |
+| --- | --- |
+| Population | 231668 |
+| Under 18 | 32704 |
+| 18–64 | 122209 |
+| 65+ | 76755 |
+| Median household income | 95241 |
+| Poverty rate | 7.67 |
+| Homeownership rate | 81.07 |
+| Unemployment rate | 5.02 |
+| Median home value | 629000 |
+| Gini index | 0.4787 |
+| Vacancy rate | 36.36 |
+| White | 198817 |
+| Black | 6467 |
+| Asian | 3422 |
+| Native | 1025 |
+| Hispanic/Latino | 8561 |
+| Bachelor's or higher | 129740 |
+
+## Source
+
+- demographics: Census ACS 2023

data/jurisdictions/us/states/ma/counties/berkshire/index.md

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+---
+type: Jurisdiction
+title: "Berkshire County, MA"
+classification: county
+fips: "25003"
+state: "MA"
+demographics:
+  population: 129430
+  population_under_18: 20662
+  population_18_64: 76351
+  population_65_plus: 32417
+  median_household_income: 76013
+  poverty_rate: 11.43
+  homeownership_rate: 69.92
+  unemployment_rate: 5.36
+  median_home_value: 305400
+  gini_index: 0.4938
+  vacancy_rate: 17.74
+  race_white: 111145
+  race_black: 3426
+  race_asian: 2461
+  race_native: 565
+  hispanic: 7591
+  bachelors_plus: 56324
+sources:
+  - field: demographics
+    source: Census ACS 2023
+confidence: official
+tags: [jurisdiction, county, ma]
+timestamp: "2026-07-03"
+---
+
+# Berkshire County, MA
+
+County jurisdiction.
+
+## Demographics (ACS 2023)
+
+| Measure | Value |
+| --- | --- |
+| Population | 129430 |
+| Under 18 | 20662 |
+| 18–64 | 76351 |
+| 65+ | 32417 |
+| Median household income | 76013 |
+| Poverty rate | 11.43 |
+| Homeownership rate | 69.92 |
+| Unemployment rate | 5.36 |
+| Median home value | 305400 |
+| Gini index | 0.4938 |
+| Vacancy rate | 17.74 |
+| White | 111145 |
+| Black | 3426 |
+| Asian | 2461 |
+| Native | 565 |
+| Hispanic/Latino | 7591 |
+| Bachelor's or higher | 56324 |
+
+## Source
+
+- demographics: Census ACS 2023

data/jurisdictions/us/states/ma/counties/bristol/index.md

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+---
+type: Jurisdiction
+title: "Bristol County, MA"
+classification: county
+fips: "25005"
+state: "MA"
+demographics:
+  population: 582270
+  population_under_18: 119489
+  population_18_64: 359313
+  population_65_plus: 103468
+  median_household_income: 85625
+  poverty_rate: 11.32
+  homeownership_rate: 62.29
+  unemployment_rate: 5.46
+  median_home_value: 451200
+  gini_index: 0.4576
+  vacancy_rate: 4.57
+  race_white: 447540
+  race_black: 25982
+  race_asian: 14233
+  race_native: 1323
+  hispanic: 59389
+  bachelors_plus: 174153
+sources:
+  - field: demographics
+    source: Census ACS 2023
+confidence: official
+tags: [jurisdiction, county, ma]
+timestamp: "2026-07-03"
+---
+
+# Bristol County, MA
+
+County jurisdiction.
+
+## Demographics (ACS 2023)
+
+| Measure | Value |
+| --- | --- |
+| Population | 582270 |
+| Under 18 | 119489 |
+| 18–64 | 359313 |
+| 65+ | 103468 |
+| Median household income | 85625 |
+| Poverty rate | 11.32 |
+| Homeownership rate | 62.29 |
+| Unemployment rate | 5.46 |
+| Median home value | 451200 |
+| Gini index | 0.4576 |
+| Vacancy rate | 4.57 |
+| White | 447540 |
+| Black | 25982 |
+| Asian | 14233 |
+| Native | 1323 |
+| Hispanic/Latino | 59389 |
+| Bachelor's or higher | 174153 |
+
+## Source
+
+- demographics: Census ACS 2023

data/jurisdictions/us/states/ma/counties/dukes/index.md

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+---
+type: Jurisdiction
+title: "Dukes County, MA"
+classification: county
+fips: "25007"
+state: "MA"
+demographics:
+  population: 20933
+  population_under_18: 3513
+  population_18_64: 11882
+  population_65_plus: 5538
+  median_household_income: 125786
+  poverty_rate: 4.43
+  homeownership_rate: 82.08
+  unemployment_rate: 6.56
+  median_home_value: 1165800
+  gini_index: 0.5535
+  vacancy_rate: 57.45
+  race_white: 16860
+  race_black: 574
+  race_asian: 309
+  race_native: 222
+  hispanic: 682
+  bachelors_plus: 12627
+sources:
+  - field: demographics
+    source: Census ACS 2023
+confidence: official
+tags: [jurisdiction, county, ma]
+timestamp: "2026-07-03"
+---
+
+# Dukes County, MA
+
+County jurisdiction.
+
+## Demographics (ACS 2023)
+
+| Measure | Value |
+| --- | --- |
+| Population | 20933 |
+| Under 18 | 3513 |
+| 18–64 | 11882 |
+| 65+ | 5538 |
+| Median household income | 125786 |
+| Poverty rate | 4.43 |
+| Homeownership rate | 82.08 |
+| Unemployment rate | 6.56 |
+| Median home value | 1165800 |
+| Gini index | 0.5535 |
+| Vacancy rate | 57.45 |
+| White | 16860 |
+| Black | 574 |
+| Asian | 309 |
+| Native | 222 |
+| Hispanic/Latino | 682 |
+| Bachelor's or higher | 12627 |
+
+## Source
+
+- demographics: Census ACS 2023

data/jurisdictions/us/states/ma/counties/essex/index.md

@@ -0,0 +1,61 @@
+---
+type: Jurisdiction
+title: "Essex County, MA"
+classification: county
+fips: "25009"
+state: "MA"
+demographics:
+  population: 813054
+  population_under_18: 169485
+  population_18_64: 493463
+  population_65_plus: 150106
+  median_household_income: 101883
+  poverty_rate: 9.37
+  homeownership_rate: 63.5
+  unemployment_rate: 5.11
+  median_home_value: 619100
+  gini_index: 0.4819
+  vacancy_rate: 5.04
+  race_white: 551107
+  race_black: 32753
+  race_asian: 29493
+  race_native: 2429
+  hispanic: 195593
+  bachelors_plus: 348582
+sources:
+  - field: demographics
+    source: Census ACS 2023
+confidence: official
+tags: [jurisdiction, county, ma]
+timestamp: "2026-07-03"
+---
+
+# Essex County, MA
+
+County jurisdiction.
+
+## Demographics (ACS 2023)
+
+| Measure | Value |
+| --- | --- |
+| Population | 813054 |
+| Under 18 | 169485 |
+| 18–64 | 493463 |
+| 65+ | 150106 |
+| Median household income | 101883 |
+| Poverty rate | 9.37 |
+| Homeownership rate | 63.5 |
+| Unemployment rate | 5.11 |
+| Median home value | 619100 |
+| Gini index | 0.4819 |
+| Vacancy rate | 5.04 |
+| White | 551107 |
+| Black | 32753 |
+| Asian | 29493 |
+| Native | 2429 |
+| Hispanic/Latino | 195593 |
+| Bachelor's or higher | 348582 |
+
+## Source
+
+- demographics: Census ACS 2023

data/jurisdictions/us/states/ma/counties/franklin/index.md

@@ -0,0 +1,61 @@
+---
+type: Jurisdiction
+title: "Franklin County, MA"
+classification: county
+fips: "25011"
+state: "MA"
+demographics:
+  population: 70944
+  population_under_18: 11803
+  population_18_64: 41681
+  population_65_plus: 17460
+  median_household_income: 74907
+  poverty_rate: 12.12
+  homeownership_rate: 70.14
+  unemployment_rate: 5.38
+  median_home_value: 329000
+  gini_index: 0.4361
+  vacancy_rate: 8.57
+  race_white: 63125
+  race_black: 956
+  race_asian: 1439
+  race_native: 82
+  hispanic: 3839
+  bachelors_plus: 32142
+sources:
+  - field: demographics
+    source: Census ACS 2023
+confidence: official
+tags: [jurisdiction, county, ma]
+timestamp: "2026-07-03"
+---
+
+# Franklin County, MA
+
+County jurisdiction.
+
+## Demographics (ACS 2023)
+
+| Measure | Value |
+| --- | --- |
+| Population | 70944 |
+| Under 18 | 11803 |
+| 18–64 | 41681 |
+| 65+ | 17460 |
+| Median household income | 74907 |
+| Poverty rate | 12.12 |
+| Homeownership rate | 70.14 |
+| Unemployment rate | 5.38 |
+| Median home value | 329000 |
+| Gini index | 0.4361 |
+| Vacancy rate | 8.57 |
+| White | 63125 |
+| Black | 956 |
+| Asian | 1439 |
+| Native | 82 |
+| Hispanic/Latino | 3839 |
+| Bachelor's or higher | 32142 |
+
+## Source
+
+- demographics: Census ACS 2023

data/jurisdictions/us/states/ma/counties/hampden/index.md

@@ -0,0 +1,61 @@
+---
+type: Jurisdiction
+title: "Hampden County, MA"
+classification: county
+fips: "25013"
+state: "MA"
+demographics:
+  population: 462815
+  population_under_18: 96761
+  population_18_64: 281531
+  population_65_plus: 84523
+  median_household_income: 71306
+  poverty_rate: 16.34
+  homeownership_rate: 62.22
+  unemployment_rate: 6.01
+  median_home_value: 298800
+  gini_index: 0.4704
+  vacancy_rate: 6.64
+  race_white: 295267
+  race_black: 40334
+  race_asian: 12007
+  race_native: 1292
+  hispanic: 125188
+  bachelors_plus: 132778
+sources:
+  - field: demographics
+    source: Census ACS 2023
+confidence: official
+tags: [jurisdiction, county, ma]
+timestamp: "2026-07-03"
+---
+
+# Hampden County, MA
+
+County jurisdiction.
+
+## Demographics (ACS 2023)
+
+| Measure | Value |
+| --- | --- |
+| Population | 462815 |
+| Under 18 | 96761 |
+| 18–64 | 281531 |
+| 65+ | 84523 |
+| Median household income | 71306 |
+| Poverty rate | 16.34 |
+| Homeownership rate | 62.22 |
+| Unemployment rate | 6.01 |
+| Median home value | 298800 |
+| Gini index | 0.4704 |
+| Vacancy rate | 6.64 |
+| White | 295267 |
+| Black | 40334 |
+| Asian | 12007 |
+| Native | 1292 |
+| Hispanic/Latino | 125188 |
+| Bachelor's or higher | 132778 |
+
+## Source
+
+- demographics: Census ACS 2023

data/jurisdictions/us/states/ma/counties/hampshire/index.md

@@ -0,0 +1,61 @@
+---
+type: Jurisdiction
+title: "Hampshire County, MA"
+classification: county
+fips: "25015"
+state: "MA"
+demographics:
+  population: 162028
+  population_under_18: 23042
+  population_18_64: 107548
+  population_65_plus: 31438
+  median_household_income: 87001
+  poverty_rate: 11.31
+  homeownership_rate: 67.8
+  unemployment_rate: 5.0
+  median_home_value: 390300
+  gini_index: 0.4709
+  vacancy_rate: 7.0
+  race_white: 132861
+  race_black: 4236
+  race_asian: 8612
+  race_native: 333
+  hispanic: 11964
+  bachelors_plus: 79914
+sources:
+  - field: demographics
+    source: Census ACS 2023
+confidence: official
+tags: [jurisdiction, county, ma]
+timestamp: "2026-07-03"
+---
+
+# Hampshire County, MA
+
+County jurisdiction.
+
+## Demographics (ACS 2023)
+
+| Measure | Value |
+| --- | --- |
+| Population | 162028 |
+| Under 18 | 23042 |
+| 18–64 | 107548 |
+| 65+ | 31438 |
+| Median household income | 87001 |
+| Poverty rate | 11.31 |
+| Homeownership rate | 67.8 |
+| Unemployment rate | 5.0 |
+| Median home value | 390300 |
+| Gini index | 0.4709 |
+| Vacancy rate | 7.0 |
+| White | 132861 |
+| Black | 4236 |
+| Asian | 8612 |
+| Native | 333 |
+| Hispanic/Latino | 11964 |
+| Bachelor's or higher | 79914 |
+
+## Source
+
+- demographics: Census ACS 2023

data/jurisdictions/us/states/ma/counties/middlesex/index.md

@@ -0,0 +1,61 @@
+---
+type: Jurisdiction
+title: "Middlesex County, MA"
+classification: county
+fips: "25017"
+state: "MA"
+demographics:
+  population: 1638365
+  population_under_18: 318865
+  population_18_64: 1052493
+  population_65_plus: 267007
+  median_household_income: 130847
+  poverty_rate: 7.74
+  homeownership_rate: 61.32
+  unemployment_rate: 4.35
+  median_home_value: 727800
+  gini_index: 0.4747
+  vacancy_rate: 4.52
+  race_white: 1093628
+  race_black: 80327
+  race_asian: 223582
+  race_native: 3246
+  hispanic: 151761
+  bachelors_plus: 1044737
+sources:
+  - field: demographics
+    source: Census ACS 2023
+confidence: official
+tags: [jurisdiction, county, ma]
+timestamp: "2026-07-03"
+---
+
+# Middlesex County, MA
+
+County jurisdiction.
+
+## Demographics (ACS 2023)
+
+| Measure | Value |
+| --- | --- |
+| Population | 1638365 |
+| Under 18 | 318865 |
+| 18–64 | 1052493 |
+| 65+ | 267007 |
+| Median household income | 130847 |
+| Poverty rate | 7.74 |
+| Homeownership rate | 61.32 |
+| Unemployment rate | 4.35 |
+| Median home value | 727800 |
+| Gini index | 0.4747 |
+| Vacancy rate | 4.52 |
+| White | 1093628 |
+| Black | 80327 |
+| Asian | 223582 |
+| Native | 3246 |
+| Hispanic/Latino | 151761 |
+| Bachelor's or higher | 1044737 |
+
+## Source
+
+- demographics: Census ACS 2023

data/jurisdictions/us/states/ma/counties/nantucket/index.md

@@ -0,0 +1,61 @@
+---
+type: Jurisdiction
+title: "Nantucket County, MA"
+classification: county
+fips: "25019"
+state: "MA"
+demographics:
+  population: 14483
+  population_under_18: 2975
+  population_18_64: 9181
+  population_65_plus: 2327
+  median_household_income: 139688
+  poverty_rate: 3.16
+  homeownership_rate: 71.78
+  unemployment_rate: 4.32
+  median_home_value: 1593800
+  gini_index: 0.4719
+  vacancy_rate: 58.3
+  race_white: 10090
+  race_black: 1372
+  race_asian: 251
+  race_native: 8
+  hispanic: 2467
+  bachelors_plus: 8240
+sources:
+  - field: demographics
+    source: Census ACS 2023
+confidence: official
+tags: [jurisdiction, county, ma]
+timestamp: "2026-07-03"
+---
+
+# Nantucket County, MA
+
+County jurisdiction.
+
+## Demographics (ACS 2023)
+
+| Measure | Value |
+| --- | --- |
+| Population | 14483 |
+| Under 18 | 2975 |
+| 18–64 | 9181 |
+| 65+ | 2327 |
+| Median household income | 139688 |
+| Poverty rate | 3.16 |
+| Homeownership rate | 71.78 |
+| Unemployment rate | 4.32 |
+| Median home value | 1593800 |
+| Gini index | 0.4719 |
+| Vacancy rate | 58.3 |
+| White | 10090 |
+| Black | 1372 |
+| Asian | 251 |
+| Native | 8 |
+| Hispanic/Latino | 2467 |
+| Bachelor's or higher | 8240 |
+
+## Source
+
+- demographics: Census ACS 2023

data/jurisdictions/us/states/ma/counties/norfolk/index.md

@@ -0,0 +1,61 @@
+---
+type: Jurisdiction
+title: "Norfolk County, MA"
+classification: county
+fips: "25021"
+state: "MA"
+demographics:
+  population: 730082
+  population_under_18: 149313
+  population_18_64: 451124
+  population_65_plus: 129645
+  median_household_income: 130739
+  poverty_rate: 6.69
+  homeownership_rate: 68.75
+  unemployment_rate: 4.94
+  median_home_value: 683900
+  gini_index: 0.4841
+  vacancy_rate: 4.02
+  race_white: 509654
+  race_black: 54240
+  race_asian: 90735
+  race_native: 706
+  hispanic: 42383
+  bachelors_plus: 451470
+sources:
+  - field: demographics
+    source: Census ACS 2023
+confidence: official
+tags: [jurisdiction, county, ma]
+timestamp: "2026-07-03"
+---
+
+# Norfolk County, MA
+
+County jurisdiction.
+
+## Demographics (ACS 2023)
+
+| Measure | Value |
+| --- | --- |
+| Population | 730082 |
+| Under 18 | 149313 |
+| 18–64 | 451124 |
+| 65+ | 129645 |
+| Median household income | 130739 |
+| Poverty rate | 6.69 |
+| Homeownership rate | 68.75 |
+| Unemployment rate | 4.94 |
+| Median home value | 683900 |
+| Gini index | 0.4841 |
+| Vacancy rate | 4.02 |
+| White | 509654 |
+| Black | 54240 |
+| Asian | 90735 |
+| Native | 706 |
+| Hispanic/Latino | 42383 |
+| Bachelor's or higher | 451470 |
+
+## Source
+
+- demographics: Census ACS 2023

data/jurisdictions/us/states/ma/counties/plymouth/index.md

@@ -0,0 +1,61 @@
+---
+type: Jurisdiction
+title: "Plymouth County, MA"
+classification: county
+fips: "25023"
+state: "MA"
+demographics:
+  population: 535075
+  population_under_18: 110836
+  population_18_64: 318499
+  population_65_plus: 105740
+  median_household_income: 114201
+  poverty_rate: 7.1
+  homeownership_rate: 77.61
+  unemployment_rate: 5.09
+  median_home_value: 556000
+  gini_index: 0.4625
+  vacancy_rate: 6.86
+  race_white: 411816
+  race_black: 42910
+  race_asian: 8987
+  race_native: 801
+  hispanic: 26184
+  bachelors_plus: 220404
+sources:
+  - field: demographics
+    source: Census ACS 2023
+confidence: official
+tags: [jurisdiction, county, ma]
+timestamp: "2026-07-03"
+---
+
+# Plymouth County, MA
+
+County jurisdiction.
+
+## Demographics (ACS 2023)
+
+| Measure | Value |
+| --- | --- |
+| Population | 535075 |
+| Under 18 | 110836 |
+| 18–64 | 318499 |
+| 65+ | 105740 |
+| Median household income | 114201 |
+| Poverty rate | 7.1 |
+| Homeownership rate | 77.61 |
+| Unemployment rate | 5.09 |
+| Median home value | 556000 |
+| Gini index | 0.4625 |
+| Vacancy rate | 6.86 |
+| White | 411816 |
+| Black | 42910 |
+| Asian | 8987 |
+| Native | 801 |
+| Hispanic/Latino | 26184 |
+| Bachelor's or higher | 220404 |
+
+## Source
+
+- demographics: Census ACS 2023

data/jurisdictions/us/states/ma/counties/suffolk/index.md

@@ -0,0 +1,61 @@
+---
+type: Jurisdiction
+title: "Suffolk County, MA"
+classification: county
+fips: "25025"
+state: "MA"
+demographics:
+  population: 785121
+  population_under_18: 125812
+  population_18_64: 555150
+  population_65_plus: 104159
+  median_household_income: 95631
+  poverty_rate: 16.18
+  homeownership_rate: 36.48
+  unemployment_rate: 6.3
+  median_home_value: 705800
+  gini_index: 0.5251
+  vacancy_rate: 8.43
+  race_white: 362430
+  race_black: 143125
+  race_asian: 72712
+  race_native: 2825
+  hispanic: 182283
+  bachelors_plus: 409219
+sources:
+  - field: demographics
+    source: Census ACS 2023
+confidence: official
+tags: [jurisdiction, county, ma]
+timestamp: "2026-07-03"
+---
+
+# Suffolk County, MA
+
+County jurisdiction.
+
+## Demographics (ACS 2023)
+
+| Measure | Value |
+| --- | --- |
+| Population | 785121 |
+| Under 18 | 125812 |
+| 18–64 | 555150 |
+| 65+ | 104159 |
+| Median household income | 95631 |
+| Poverty rate | 16.18 |
+| Homeownership rate | 36.48 |
+| Unemployment rate | 6.3 |
+| Median home value | 705800 |
+| Gini index | 0.5251 |
+| Vacancy rate | 8.43 |
+| White | 362430 |
+| Black | 143125 |
+| Asian | 72712 |
+| Native | 2825 |
+| Hispanic/Latino | 182283 |
+| Bachelor's or higher | 409219 |
+
+## Source
+
+- demographics: Census ACS 2023

data/jurisdictions/us/states/ma/counties/worcester/index.md

@@ -0,0 +1,61 @@
+---
+type: Jurisdiction
+title: "Worcester County, MA"
+classification: county
+fips: "25027"
+state: "MA"
+demographics:
+  population: 867788
+  population_under_18: 178921
+  population_18_64: 541177
+  population_65_plus: 147690
+  median_household_income: 95939
+  poverty_rate: 10.33
+  homeownership_rate: 65.78
+  unemployment_rate: 5.27
+  median_home_value: 423700
+  gini_index: 0.4525
+  vacancy_rate: 5.45
+  race_white: 630934
+  race_black: 45228
+  race_asian: 46238
+  race_native: 2170
+  hispanic: 118968
+  bachelors_plus: 343880
+sources:
+  - field: demographics
+    source: Census ACS 2023
+confidence: official
+tags: [jurisdiction, county, ma]
+timestamp: "2026-07-03"
+---
+
+# Worcester County, MA
+
+County jurisdiction.
+
+## Demographics (ACS 2023)
+
+| Measure | Value |
+| --- | --- |
+| Population | 867788 |
+| Under 18 | 178921 |
+| 18–64 | 541177 |
+| 65+ | 147690 |
+| Median household income | 95939 |
+| Poverty rate | 10.33 |
+| Homeownership rate | 65.78 |
+| Unemployment rate | 5.27 |
+| Median home value | 423700 |
+| Gini index | 0.4525 |
+| Vacancy rate | 5.45 |
+| White | 630934 |
+| Black | 45228 |
+| Asian | 46238 |
+| Native | 2170 |
+| Hispanic/Latino | 118968 |
+| Bachelor's or higher | 343880 |
+
+## Source
+
+- demographics: Census ACS 2023