I just used my friend Google. Apparently CA is charging a flat $200 per EV, and $100 per plug-in hybrid. Starting this year it will go up $3 every four years.
So Google tells me it's 58 cents gas tax per gallon in CA, that works out to 345 gallons of gas per year to equal $200. My previous car had a ~15 gallon tank, which is 23 FULL tanks per year, filling up from almost empty every two weeks. That's BS, I never drove even close to that much, usually I could fill up every 4-6 weeks depending on my driving habits. Oh well, what else would I expect from the land of taxes, I get the need to make that revenue up, so I guess those of us who can afford a nice EV have to "pay our 'fair' share"

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This is starting to get off topic, but CA sometimes has an odd way of encouraging people to be more environmentally conscious and/or progressive. With the new electricity pricing scheme the PUC is going to put into place in a few years, it will totally discourage rooftop solar as well (which we were planning on doing, but likely not anymore).