According to the hugely successful Shark Week on Discovery Channel, there were 108 shark attacks off California in the 20th century.
But from 2000 to 2010 shark attacks, there were 54 and mostly from Great Whites.
Why the increase? Great Whites have been protected off California since 1992. Gill netting has been banned. Surfing equipment is better with people going out further and staying in the water longer.
Hot spots for Great Whites are Malibu and Santa Monica. As many as a dozen juvenile Great Whites will be about 100 yards off Santa Monica beach at any one time.
Why there? Great food source...lots of fish.