Year	% gross
1970	45.1841888427734
1971	45.1930313110352
1972	45.9519386291504
1973	48.274658203125
1974	51.2038917541504
1975	53.411060333252
1976	54.4033889770508
1977	56.0082206726074
1978	58.104621887207
1979	60.1361312866211
1980	61.7320404052734
1981	62.3387985229492
1982	60.6815986633301
1983	59.2222785949707
1984	57.7067909240723
1985	58.1574783325195
1986	58.5956611633301
1987	59.4825706481934
1988	60.903938293457
1989	62.0871086120605
1990	61.0344390869141
1991	58.3810005187988
1992	53.0419311523438
1993	52.6710815429688
1994	51.8607902526855
1995	53.9093704223633
1996	55.6174201965332
1997	57.1343612670898
1998	58.442440032959
1999	61.2487297058105
2000	62.5455703735352
2001	63.0961608886719
2002	64.4983520507813
2003	66.9599075317383
2004	68.9484329223633
2005	71.0920333862305
2006	72.5525970458984
2007	74.1203002929688
2008	74.7857894897461
2009	76.4216003417969
2010	78.5376586914063
2011	80.5692367553711
2012	82.2465209960938
2013	84.1037673950195
2014	84.3106079101563
2015	84.4565277099609
2016	84.33251953125
2017	85.2079925537109
2018	89.3287963867188
2019	93.4151382446289
2020	94.335563659668