Complex sentence: Growth was initially slow--the fifth US brewpub opened in 1986, but the growth since then has been considerable: the Brewers Association reports that in 2012 there were 2,075 regional craft breweries, microbreweries and brewpubs in the United States.
Split into simpler sentences: Growth was initially slow--the fifth US brewpub opened in 1986, but the growth since then has been considerable. The Brewers Association reports that in 2012 there were 2,075 regional craft breweries, microbreweries and brewpubs in the United States.