Source:

2015 Silicon Valley Index (Data: California Department of Finance)

Analysis:

Silicon Valley Institute for Regional Studies

Data are from the California Department of Finance E-2: California County Population Estimates and Components of Change July 1, 1990-2000, E-2: California County Population Estimates and Components of Change by Year – July 1, 2000-2010, E-6: Population Estimates and Components of Change by County – July 1, 2010-2013 and July 1, 2010-2012, and are for San Mateo and Santa Clara Counties. The July 1, 2010-2013 population estimates include revised July 2011 and July 2012 estimates. Estimates for 2014 are provisional. Data for the years 2000-2010 are based on revised estimates released in December 2011. Birth Rates are calculated as the total number of births per 1,000 people.

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