..."'Creative class'" mean(s) people working in management, business, science, and the arts"...
According to the Patch:
"Data are from the United States Census Bureau's 2011 American Community Survey." [And notice the erudite use of "data" as a plural in the Patch! Can you do that?]
The link is santamonica.patch.com/groups/newscruncher/p/what-section-of-town-does-the-creative-class-live-in-santamonica