CHART 2: U.S. MSAs with the most workers in computing and math occupations (May 2015):
1. 280,900 New York-Jersey City-Newark
2. 251,000 Silicon Valley (San Francisco-San Jose-Oakland)
3. 185,200 Washington, D.C.
4. 147,400 Los Angeles-Orange County (Anaheim-Irvine)
5. 141,700 Chicago
6. 140,100 Dallas-Fort Worth
7. 126,600 Boston (including Nashua, N.H.)
8. 117,000 Seattle
9. 91,200 Philadelphia
10. 84,000 Houston