California has wonderful shelter stats available online atwww.cdph.ca.gov/HealthInfo/discond/Pages/LocalRabiesControlActivities.aspx
I've put them together on a spreadsheet to make it easier to compare year to year. 1997-2012 updated 4/14
CA shelter stats spreadsheet
Los Angeles Animal Services also has some dynamite stuff at www.sheltertrak.com/downloads/laas/
Los Angeles, CA worksheet updated 3/14