Year	% gross
1970	54.5780487060547
1971	54.4494209289551
1972	57.0570602416992
1973	58.8766593933105
1974	59.790470123291
1975	62.7559585571289
1976	65.3202362060547
1977	67.3009719848633
1978	68.790771484375
1979	69.7104034423828
1980	73.0488204956055
1981	73.1513290405273
1982	75.1998901367188
1983	76.6716079711914
1984	78.4707412719727
1985	79.0194778442383
1986	80.4345169067383
1987	81.7438735961914
1988	82.6142578125
1989	83.173713684082
1990	85.0524063110352
1991	85.8970565795898
1992	84.2184524536133
1993	84.6000900268555
1994	86.3701019287109
1995	85.2468490600586
1996	85.5141296386719
1997	87.2981185913086
1998	88.2594985961914
1999	89.2224197387695
2000	89.8479766845703
2001	91.0023727416992
2002	92.4470520019531
2003	93.8229064941406
2004	94.7194519042969
2005	94.8449020385742
2006	95.724250793457
2007	96.3285675048828
2008	96.3882217407227
2009	96.5325088500977
2010	96.7271118164062
2011	95.9381103515625
2012	97.7503204345703
2013	98.4051666259766
2014	95.9049530029297
2015	95.5480880737305
2016	95.3261032104492
2017	95.478157043457
2018	95.72802734375
2019	96.1458511352539
2020	96.6734619140625
2021	96.6420822143555
2022	95.1486282348633