Only sport active adults. Q: How often do you usually practice sports/exersice? Sample size: 2007: 3547, 2011: 3437 and 2016: 3220. Source: The Danish Institute for Sports Studies: http://www.idan.dk/vidensbank/udgivelser/danskernes-motions-og-sportsvaner-2016/03e7c32f-151c-44d2-a678-a69400850057