This information was compiled by the Office of Education in each county in accordance with California Basic Educational Data System. Data for the San Jose, Santa Clara and Mountain View-Los Altos school districts is estimated. The indicator in the 1996 Index measured the derived rate of students dropping out of school between their sophomore and senior years. The single-year rate is comparable to national dropout statistics compiled by National Center for Education Statistics. IN SAT'S SAT data from California Department of Education include Santa Clara and San Mateo Counties.
Data are combined verbal and math scores.
Time series data have been adjusted to reflect the new centering methodology of The College Board. The enrollment data for extension and continuing education are reported directly by UC Santa Cruz Extension, San Jose State Continuing Education, National University and Phoenix University. Engineering programs serving Silicon Valley include San Jose State University, Santa Clara University, Stanford University, UC Berkeley, UC Santa Cruz, Cogswell College and San Francisco State University. Vehicle hours of delay are a multiplicative function of three factors. Congestion is defined as a condition where the average speed drops below 35 mph for 15 minutes or more on a typical weekday.