Year	% gross
1970	15.1985902786255
1971	16.7514591217041
1972	19.1528797149658
1973	20.6716995239258
1974	22.7027702331543
1975	24.5410995483398
1976	24.7110996246338
1977	24.4268207550049
1978	29.1472492218018
1979	34.4099006652832
1980	32.7882499694824
1981	40.8322296142578
1982	44.1713409423828
1983	44.9971504211426
1984	46.7788314819336
1985	48.5251007080078
1986	51.2584381103516
1987	57.0978889465332
1988	56.3926010131836
1989	54.6946792602539
1990	51.5535011291504
1999	38.1321983337402
2000	43.6597213745117
2001	49.2600898742676
2002	53.657398223877
2003	50.9565887451172
2004	53.1018981933594
2005	60.1076393127441
2006	65.5805816650391
2007	68.1955184936523
2008	67.3989486694336
2009	64.2845764160156
2010	65.020378112793
2011	63.8550605773926
2012	66.04296875
2013	46.1968193054199
2014	47.1491508483887
2015	50.9555816650391
2016	62.2730407714844
2017	62.9881896972656
2018	63.0574989318848
2019	63.2373809814453
2020	27.4257698059082