Year	% gross
1971	25.1821708679199
1972	26.263219833374
1980	28.1157398223877
1984	38.5456008911133
1986	37.3566703796387
1989	30.0264301300049
1990	32.0651092529297
1991	32.5638618469238
1992	33.4076690673828
1993	35.2662391662598
1994	36.3721885681152
1995	37.9577598571777
1996	37.9966812133789
1997	38.1027717590332
1998	46.8772201538086
1999	47.8865203857422
2000	49.2078514099121
2001	49.1540107727051
2002	49.672779083252
2003	49.0655517578125
2004	51.4902114868164
2005	52.3190689086914
2006	52.0453796386719
2007	50.7508583068848
2008	48.6435089111328
2009	46.648738861084
2010	47.6738700866699
2011	54.3034210205078
2012	57.1936912536621
2013	62.6014709472656
2014	67.6237564086914
2015	70.5327224731445
2016	73.6151504516602
2017	73.9689483642578
2018	75.1000671386719
2019	78.0276184082031
2020	79.0607070922852