The number of craft beer makers in America is growing at record speed.

More than 400 new craft breweries opened their doors in 2012, according to the Brewer's Association.

Craft brewers still make up only 6.5% of the total beer market. But enthusiasts are confident that number will continue to grow.

This week, the Brewers Association released its list of the top craft breweries in 2012, based on sales volume. We put together some information on the top 20, which beer lovers should keep on their radar.