Year	% gross
1970	26.642599105835
1971	27.5430908203125
1972	30.4722499847412
1973	32.7712287902832
1974	38.2641181945801
1975	39.4313087463379
1976	42.472599029541
1977	45.7317695617676
1978	46.9301300048828
1979	47.9033508300781
1980	48.9564094543457
1981	49.2850494384766
1982	50.4017715454102
1983	50.8877105712891
1984	51.7792701721191
1985	52.2010803222656
1986	53.3600196838379
1987	54.1810913085938
1988	54.8513984680176
1989	55.3801498413086
1990	55.5671501159668
1991	55.757568359375
1992	56.9021682739258
1993	57.6772003173828
1994	58.7914695739746
1995	60.2360000610352
1996	62.4982604980469
1997	63.6996383666992
1998	66.0217514038086
1999	68.1530685424805
2000	69.6983032226562
2001	71.2278671264648
2002	83.9654006958008
2003	81.0318832397461
2004	83.0644073486328
2005	83.2868804931641
2006	77.6193923950195
2007	82.8057098388672
2008	84.0651092529297
2009	85.2876663208008
2010	86.4618530273438
2011	87.0252304077148
2012	86.7171325683594
2013	91.6631774902344
2014	91.7692565917969
2015	92.2106781005859
2016	93.7063827514648
2017	94.5280380249023
2018	95.5052185058594
2019	95.0030670166016
2020	94.1355895996094
2021	93.5281372070312
2022	93.9353408813477