Only sports active children. Q: How often do you usually practice sports/exercise? Sample size: 2007: 1930, 2011: 1899 and 2016: 3066. Source: The Danish Institute for Sports Studies: http://www.idan.dk/vidensbank/udgivelser/danskernes-motions-og-sportsvaner-2016/03e7c32f-151c-44d2-a678-a69400850057