Year	% gross
1970	14.0696496963501
1971	14.3850803375244
1972	14.9504203796387
1973	15.7161903381348
1974	16.1409797668457
1975	16.762149810791
1976	17.0201892852783
1977	17.2737407684326
1978	17.8261108398438
1979	18.1895809173584
1980	18.763240814209
1981	19.8356094360352
1982	21.0524196624756
1983	21.2491798400879
1984	21.8197193145752
1985	24.3982906341553
1986	25.9004192352295
1987	26.5888996124268
1988	26.1541309356689
1989	25.6208000183105
1990	25.6222190856934
1991	26.8078098297119
1992	27.5245800018311
1993	27.1907901763916
1994	27.048189163208
1995	27.0497493743896
1996	26.8494892120361
1997	26.8217391967773
1998	26.7033596038818
1999	26.7340698242188
2000	26.8756008148193
2001	27.9123306274414
2002	28.0316600799561
2003	29.3871307373047
2004	31.1523494720459
2005	31.8729095458984
2006	33.6650085449219
2007	33.7534599304199
2008	35.6703910827637
2009	37.4169006347656
2010	38.8597984313965
2011	39.1911201477051
2012	40.4471206665039
2013	43.228588104248
2014	41.1252593994141
2015	42.3947105407715
2016	41.5261497497559
2017	41.5987281799316
2018	43.0299415588379
2019	44.639820098877
2020	45.0553398132324
2021	45.1225814819336
2022	45.2397689819336