Year	% gross
1971	3.34432005882263
1972	3.72076988220215
1973	3.84835004806519
1974	8.45641994476318
1975	8.71127033233643
1976	9.13879013061523
1977	12.3966102600098
1978	12.734299659729
1979	13.1994895935059
1980	15.7374696731567
1981	19.8635005950928
1982	22.6442203521729
1983	23.6176300048828
1984	24.9579105377197
1985	25.2652492523193
1986	28.7254295349121
1987	31.2082195281982
1988	30.7141208648682
1990	34.3836097717285
1991	50.6818084716797
1993	53.1622505187988
1994	55.6984405517578
1995	57.1042785644531
1996	60.1733589172363
1998	65.4165191650391
1999	68.1792984008789
2000	72.2864074707031
2001	75.4115982055664
2002	76.0526428222656
2003	78.5453491210938
2004	79.3281173706055
2005	80.6271667480469
2006	81.0865478515625
2007	80.9531402587891
2008	81.6005096435547
2009	85.005989074707
2010	87.4434280395508
2011	90.6909790039063
2012	90.7803115844727
2013	90.2591018676758
2014	91.5148086547852
2015	93.3785400390625
2016	93.7734603881836
2017	93.880859375
2018	90.9614486694336
2019	94.4449615478516
2020	99.3589935302734