Between the dawn of craft beer with New Albion and Anchor way back in the day and the year 2012, California achieved the number 300 in breweries operating in the state.
Between 2012 and now (which is just 3 some odd years if my basic math is correct) another 300 were born.
You can read more about it HERE but one amazing take away is that in the year 2014. Each week in California, all 52 of them, two breweries opened.