Year	% gross
1971	2.20262002944946
1972	2.36607003211975
1973	2.37055993080139
1974	4.36352014541626
1975	9.2536096572876
1976	17.8740692138672
1977	20.9963607788086
1978	22.6363506317139
1979	24.1522006988525
1980	21.2220897674561
1981	14.8302698135376
1982	15.9627304077148
1983	13.6621198654175
1984	14.7118101119995
1985	5.31832981109619
1986	6.91477012634277
1987	7.51885986328125
1988	8.44235038757324
1989	9.80830955505371
1990	11.6312198638916
1991	12.0531301498413
1992	13.2739496231079
1993	8.90213012695313
1994	7.08760023117065
1995	7.75198984146118
1997	11.5864696502686
1998	15.9926300048828
1999	15.0380401611328
2000	18.4652004241943
2001	22.2702007293701
2002	26.8162307739258
2003	34.1632118225098
2004	38.0072593688965
2005	44.4729118347168
2006	50.051399230957
2007	51.2865982055664
2008	50.570369720459
2009	41.1471786499023
2010	40.1560897827148
2011	40.6141204833984
2012	34.8915405273438
2013	38.5760192871094
2014	43.5214500427246
2015	52.5569114685059
2016	53.8604698181152
2017	62.4892425537109
2018	68.5413055419922
2019	74.3259429931641
2020	72.4765472412109