Year	% gross
1972	49.5182914733887
1973	55.769588470459
1974	57.9597015380859
1975	58.1813583374023
1976	59.6101608276367
1977	59.972728729248
1978	57.2517890930176
1979	53.6160202026367
1980	48.6279716491699
1981	46.6740112304688
1982	43.9314994812012
1983	42.238468170166
1984	42.1165809631348
1985	43.4700317382812
1986	45.0029296875
1987	47.2412490844727
1988	49.0694198608398
1989	49.8776206970215
1990	50.204231262207
1991	52.1218414306641
1992	53.9202995300293
1993	55.4791107177734
1994	55.4332809448242
1995	56.8351707458496
1996	59.2519187927246
1997	61.0750198364258
1998	62.2435417175293
1999	63.2263412475586
2000	63.7510299682617
2001	65.4358215332031
2002	66.0755615234375
2003	67.1619720458984
2004	69.4529037475586
2005	71.2351379394531
2006	73.2819366455078
2007	76.6344680786133
2008	79.0665512084961
2009	82.8729629516602
2010	85.3438491821289
2011	86.4908294677734
2012	86.843620300293
2013	87.8742294311523
2014	87.0403823852539
2015	87.2032089233398
2016	86.2776565551758
2017	86.3755722045898
2018	86.660530090332
2019	88.1462631225586
2020	88.9317016601562
2021	89.5980682373047
2022	90.0938415527344