Year	% gross
2007	10.5181102752686
2008	12.1914596557617
2010	13.8486099243164
2011	5.78200912475586
2012	9.44606018066406
2013	11.1131896972656
2014	10.9299602508545
2015	11.70166015625
2016	13.4508895874023
2017	14.1349496841431