Year	% gross
1970	45.6608200073242
1971	45.6816482543945
1972	46.5046882629395
1973	48.939281463623
1974	51.8069000244141
1975	54.2428398132324
1976	55.0444984436035
1977	56.4327392578125
1978	58.2268295288086
1979	60.1361999511719
1980	61.864559173584
1981	62.3757400512695
1982	60.7873687744141
1983	59.3566398620605
1984	57.9257011413574
1985	58.3488998413086
1986	58.8156204223633
1987	59.6891708374023
1988	61.0826416015625
1989	62.3671989440918
1990	61.4054412841797
1991	58.3819198608398
1992	55.3328590393066
1993	53.160758972168
1994	51.9436187744141
1995	53.8309516906738
1996	55.1950912475586
1997	56.3391304016113
1998	57.9420509338379
1999	61.2618408203125
2000	62.2891502380371
2001	63.113410949707
2002	64.4346008300781
2003	66.8517532348633
2004	68.5090637207031
2005	70.6845932006836
2006	72.1820068359375
2007	73.5928726196289
2008	74.3793563842773
2009	75.9612121582031
2010	78.1065063476563
2011	80.0355911254883
2012	81.414421081543
2013	83.3977813720703
2014	83.5253829956055
2015	83.3750305175781
2016	83.0616836547852
2017	83.8893280029297
2018	88.3930969238281
2019	92.4905014038086
2020	93.5694885253906