 In 2007, JumpSport's 15-employee business had $13 million in sales and in 2008 Publicover claimed over $50 million of lost sales due to patent infringement.From 1998 to 2006, enclosures gained broad acceptance in the marketplace and were being sold together with more than 80% of all trampolines.In that same period, U.S. sales of trampolines doubled from around 550,000 to 1,200,000 while total annual reported trampoline injuries began to decline.