Year	% gross
1971	45.9906387329102
1972	46.1464614868164
1973	48.6000099182129
1974	51.0938491821289
1975	51.6937599182129
1976	52.9504890441895
1977	54.5155296325684
1978	48.1648597717285
1979	47.898380279541
1980	47.1800193786621
1981	47.9244613647461
1982	48.6079406738281
1983	50.5874481201172
1984	50.7413215637207
1985	52.1836700439453
1986	52.1590805053711
1987	53.7716598510742
1988	53.4772796630859
1989	53.0443305969238
1990	52.80419921875
2000	63.4712295532227
2001	63.471809387207
2002	63.8420181274414
2003	65.7692565917969
2004	69.646858215332
2005	73.1828079223633
2006	69.8638076782227
2007	74.2201995849609
2008	73.9127197265625
2009	74.1731033325195
2010	74.5180969238281
2011	71.025993347168
2012	70.7852478027344
2013	70.2436370849609
2014	74.3189010620117
2015	74.8479919433594
2016	79.839973449707
2017	78.8430633544922
2018	82.0333099365234
2019	83.1845779418945
2021	84.3679962158203