http://www.bayareacensus.ca.gov/counties/SanFranciscoCounty40.htm http://www.bayareacensus.ca.gov/counties/SanFranciscoCounty4... 1940 was 95% white and 0.8% b

http://www.bayareacensus.ca.gov/counties/SanFranciscoCounty40.htm http://www.bayareacensus.ca.gov/counties/SanFranciscoCounty4... 1940 was 95% white and 0.8% black. so in the 30 years from 1940 to 1970 it went from .08% to 13.4%. that's gentrification too, which was my point.