Year	% gross
1971	18.7541809082031
1972	19.899019241333
1973	21.6669101715088
1974	22.5464096069336
1975	23.9004707336426
1976	25.1036701202393
1977	25.155179977417
1978	26.1239891052246
1979	24.4912300109863
1980	25.3386707305908
1981	25.7001991271973
1982	27.2120208740234
1983	27.7231197357178
1985	29.2940998077393
1986	29.836799621582
1987	30.3171501159668
1988	31.3626308441162
1989	34.8746299743652
1990	37.1800117492676
1991	39.3352088928223
1992	42.4382705688477
1993	45.4095916748047
1994	49.6853713989258
1995	51.3481597900391
1996	53.614070892334
1997	54.3035583496094
1998	54.0280609130859
1999	53.0050811767578
2000	50.6030807495117
2001	50.4472885131836
2002	50.2516899108887
2003	52.3169784545898
2004	53.4576301574707
2005	53.8823318481445
2006	53.8754196166992
2007	52.9475402832031
2008	52.4755210876465
2009	52.7731018066406
2010	54.881721496582
2011	55.6257286071777
2012	57.9090118408203
2013	59.8487586975098
2014	61.5104789733887
2015	62.7859306335449
2016	64.7276763916016
2017	65.8022308349609
2018	67.5435180664062
2019	67.7331314086914
2020	68.4094924926758
2021	68.974853515625
2022	70.794189453125