On the RAND link below you can find 2020 forecasts for California employment by occupation.
How:
1) Enter CalPoly login if prompted
2) Click : Labor Force, Employment & Earnings
3) Click: Occupational Projections
4) Check: California
5) Click : Choose from a List
6) Select category, then more specific occupation.
Shows 2008 employment by occupation, 2020 projection, and differential.