Year	% gross
1971	0.0780199989676476
1972	0.116599999368191
1973	0.181250005960464
1974	0.216309994459152
1975	0.295260012149811
2002	3.97519993782043
2003	4.01269006729126
2004	4.00695991516113
2005	4.70359992980957
2006	5.81414985656738
2007	6.52092981338501
2008	7.09226989746094
2009	8.0941801071167
2010	10.1274995803833
2011	10.3382701873779
2012	11.5151100158691
2013	13.4282197952271
2014	14.3242101669312
2015	15.0476999282837
2016	11.6282300949097
2017	11.3897695541382
2018	13.3882303237915