Year	% gross
2001	28.7108192443848
2002	31.2868995666504
2003	31.8682403564453
2004	35.2445983886719
2005	35.4255905151367
2006	34.6549415588379
2007	33.5996513366699
2008	35.658878326416
2009	39.1237297058105
2010	39.7788696289062
2011	36.7234191894531
2012	40.6370315551758
2013	43.9881210327148
2014	44.5050392150879
2015	47.1733207702637
2016	45.6116714477539
2017	49.2328491210938
2018	48.748851776123