Year	% gross
1973	39.7472190856934
1974	40.4497108459473
1975	45.0184097290039
1976	52.6714515686035
1977	54.628360748291
1978	54.2956008911133
1979	57.0728988647461
1980	57.1138610839844
1981	53.8623695373535
1982	56.160099029541
1983	58.7325096130371
1984	57.3774681091309
1985	56.2735786437988
1986	57.3273315429688
1987	55.3666915893555
1988	58.5826606750488
1989	58.1557083129883
1990	58.6056900024414
1991	59.7535209655762
1992	61.7877311706543
1993	64.8294372558594
1994	67.1110534667969
1995	68.0217819213867
1996	69.1332778930664
1997	69.9027404785156
1998	71.023063659668
1999	72.1487884521484
2000	74.7011566162109
2001	72.4938125610352
2002	76.1139068603516
2003	75.8679504394531
2004	82.2424621582031
2005	84.3047790527344
2006	82.8124771118164
2007	81.4596405029297
2008	81.4304733276367
2009	83.7413177490234
2010	81.6067276000977
2011	82.5054473876953
2012	84.0528793334961
2013	87.9521102905273
2014	79.2869186401367
2015	82.401252746582
2016	77.0424423217773
2017	78.5600814819336
2018	77.5484008789063
2019	79.9028396606445
2020	71.5514907836914