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Diversity Index, 1980-2000


 
1980
1990
2000
2010 % Change
Alameda
0.682
0.767
0.889
0.903 32.4%
Contra Costa
0.502
0.603
0.757
0.827 64.7%
Marin
0.284
0.374
0.485
0.555 95.4%
Napa
0.315
0.399
0.534
0.648 105.7%
San Francisco
0.760
0.780
0.818
0.811 6.7%
San Mateo
0.572
0.676
0.775
0.797 39.3%
Santa Clara
0.555
0.678
0.786
0.802 44.5%
Solano
0.604
0.703
0.844
0.894 48.0%
Sonoma
0.284
0.363
0.504
0.576 102.8%
TOTAL BAY AREA
0.605
0.694
0.809
0.840 38.8%

The racial/ethnic diversity index ranges from a low of 0.0 (entire population is of one racial/ethnic group) to a high of 1.0 (population in equally distributed between all racial/ethnic groups.)

This particular diversity index is based on five racial/ethnic categories:

  • White only, non-hispanic;
  • Black/African American only, non-hispanic;
  • Asian or Hawaiian/Pacific Islander only, non-hispanic;
  • Hispanic/Latino, any race;
  • American Indian/Alaskan Native or Other Race or Two-or-More Race, non-hispanic.

Diversity Index calculation

Notes: Data is from the U.S. decennial censuses, 1980 to 2010. Data analysis by staff of the Metropolitan Transportation Commission.

 



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