US Outdoor revenues grew 3.3% during the first quarter of 2016 according to the the May 19, 2016 OAAA press release.  Outdoor revenues have outpaced the US economy for the last four quarters as you can see in the chart below.

US Outdoor Revenue Growth Versus US Quarterly Seasonally Adjusted GDP Growth For Last Four Quarters

Sources:  OAAA, Federal Reserve Bank of St Louis