Year	% gross
1973	27.3429908752441
1974	26.9993896484375
1975	29.4059295654297
1976	34.137149810791
1977	38.3484382629395
1978	39.7998809814453
1979	42.3383598327637
1980	45.1539192199707
1981	50.4047698974609
1982	51.4976501464844
1983	52.9939117431641
1984	55.7034301757813
1985	58.2926712036133
1986	56.7394409179688
1987	56.6814804077148
1988	55.8365898132324
1989	57.0709495544434
1990	56.8852806091309
1991	58.4886589050293
1992	56.7947998046875
1993	56.7295913696289
1994	58.0049896240234
1995	60.0090217590332
1996	62.1951293945313
1997	63.3631210327148
1998	66.1851272583008
1999	61.0794410705566
2000	61.1178512573242
2001	57.6260108947754
2002	57.9765586853027
2003	56.2295989990234
2004	56.6393203735352
2005	58.0821189880371
2006	59.4554786682129
2007	59.2359390258789
2008	55.5356903076172
2009	59.0484199523926
2010	54.5186614990234
2012	54.7691307067871
2013	54.055980682373
2014	58.3690490722656
2015	56.8390197753906
2016	50.2492713928223
2017	53.9781303405762
2018	50.888599395752
2019	54.8680114746094
2020	60.4151496887207
2021	59.870189666748