Year	% gross
1971	9.61534976959229
1972	10.1977300643921
1973	10.4640398025513
1974	10.8360395431519
1975	11.1839199066162
1976	11.549750328064
1977	12.0468101501465
1978	12.3748998641968
1979	12.996000289917
1980	13.6103296279907
1981	14.2016096115112
1982	15.1238403320312
1983	15.3572196960449
1984	15.6368398666382
1985	15.9757995605469
1986	15.9368600845337
1987	15.3786897659302
1988	14.9789400100708
1989	14.5497398376465
1990	14.4172096252441
1991	14.3399000167847
1992	14.8368301391602
1993	16.1666793823242
1994	18.995059967041
1995	21.2722301483154
1996	23.3904590606689
1997	25.2151508331299
1998	29.4455699920654
1999	33.0597610473633
2000	37.8087615966797
2001	42.3074607849121
2002	47.3539390563965
2003	54.6319618225098
2004	61.5049018859863
2005	64.9763336181641
2006	66.3979721069336
2007	66.2641830444336
2008	63.9729499816895
2009	61.9762992858887
2010	60.7484703063965
2011	59.9982109069824
2012	60.6758918762207
2013	57.2072296142578
2014	52.8166618347168
2015	50.0649108886719
2016	49.4762191772461
2017	49.9092292785645
2018	50.8984184265137
2019	52.3602600097656
2020	54.6012001037598
2021	56.5243492126465