Before 1950
1950-1999
After 1999
Metro central
Metro mixed
Metro noncentral
Not metro
0-1
6 or more
Not bay area
Bay area
1850
1860
1870
1880
1900
1910
1920
1930
1940
1950
1960
1970
1980
1990
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019