California’s population grew about 260,135 in 2011 (that’s down a tad from 2000) but still adding population at about a little less than two TV’s a year.
Mostly the growth is organic (more births than deaths etc…) these days.
With emigration (not migration ) being the dominate other source of population growth since the nighties at least, these days more from Asia less from Mexico than in the past.
Once the economy ever gets moving (which it will someday) I expect Socal to get it’s mojo back.