U.S. Census Bureau
 Housing Patterns


Table 5-1


Table 5-1. Descriptive Statistics for Residential Segregation Indexes for Blacks or African Americans: 1980, 1990, 2000
  ALL METROPOLITAN AREAS SELECTED METROPOLITAN AREAS
Weighted Average Weighted Average Minimum 25th Percentile Median 75th Percentile Maximum

Dissimilarity
1980 0.727 0.730 0.272 0.682 0.750 0.812 0.908
1990 0.678 0.682 0.227 0.606 0.683 0.769 0.899
2000 0.640 0.645 0.263 0.569 0.648 0.730 0.846
Percent Change
1980-1990 -6.8% -6.6% -16.6% -11.1% -8.9% -5.2% -1.0%
1990-2000 -5.6% -5.4% 15.8% -6.1% -5.1% -5.1% -5.9%
1980-2000 -12.0% -11.7% -3.4% -16.6% -13.5% -10.1% -6.8%

Isolation
1980 0.655 0.662 0.070 0.586 0.698 0.758 0.855
1990 0.614 0.622 0.064 0.525 0.653 0.735 0.842
2000 0.591 0.601 0.061 0.495 0.649 0.721 0.827
Percent Change
1980-1990 -6.3% -6.0% -7.6% -10.5% -6.5% -3.0% -1.5%
1990-2000 -3.8% -3.4% -5.3% -5.7% -0.6% -1.9% -1.7%
1980-2000 -9.9% -9.3% -12.4% -15.7% -7.1% -4.9% -3.2%

Delta
1980 0.834 0.835 0.438 0.814 0.862 0.902 0.954
1990 0.816 0.816 0.467 0.795 0.834 0.880 0.967
2000 0.793 0.793 0.454 0.761 0.811 0.844 0.966
Percent Change
1980-1990 -2.2% -2.2% 6.6% -2.3% -3.2% -2.4% 1.4%
1990-2000 -2.8% -2.8% -2.7% -4.3% -2.8% -4.1% -0.1%
1980-2000 -5.0% -5.0% 3.7% -6.5% -5.9% -6.4% 1.2%

Absolute Centralization
1980 0.753 0.755 -0.022 0.721 0.789 0.846 0.966
1990 0.743 0.745 0.054 0.717 0.773 0.831 0.973
2000 0.722 0.724 0.015 0.663 0.749 0.818 0.962
Percent Change
1980-1990 -1.3% -1.3% 345.2% -0.5% -2.1% -1.7% 0.7%
1990-2000 -2.8% -2.8% -71.7% -7.5% -3.1% -1.6% -1.1%
1980-2000 -4.1% -4.1% 169.5% -8.0% -5.1% -3.3% -0.4%

Spatial Proximity
1980 1.435 1.441 1.024 1.261 1.441 1.596 2.054
1990 1.400 1.406 1.021 1.226 1.388 1.508 1.826
2000 1.374 1.381 1.015 1.220 1.382 1.469 1.821
Percent Change
1980-1990 -2.5% -2.4% -0.2% -2.8% -3.7% -5.5% -11.1%
1990-2000 -1.9% -1.8% -0.6% -0.5% -0.4% -2.6% -0.3%
1980-2000 -4.3% -4.1% -0.8% -3.3% -4.0% -8.0% -11.4%
Note: Selected Metropolitan Areas (220 of 330) are those with at least 10 tracts and 3% or 20,000 or more Blacks or African Americans in 1980. Higher values indicate more segregation; the reference group is non-Hispanic Whites.
Source: U.S. Census Bureau, Census 1980, 1990, and 2000 Summary File 1.
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Source: U.S. Census Bureau, Housing and Household Economic Statistics Division
Last Revised: December 06, 2004