Year	% gross
1976	49.9688606262207
1981	57.0576286315918
1982	57.908519744873
1983	59.8786888122559
1984	62.0871391296387
1985	63.6232299804688
1986	66.6997299194336
1987	81.9089965820312
1988	83.9579620361328
1989	85.7267227172852
1990	86.7593994140625
1991	86.5103378295898
1992	87.9532012939453
1993	88.5244216918945
1994	90.7965469360352
1995	89.9933090209961
2010	93.9506988525391
2011	96.102783203125
2012	97.5180969238281
2013	98.0986404418945
2014	96.3430023193359
2015	97.4189987182617
2016	96.7262725830078
2017	97.6746063232422
2018	99.4162216186523
2021	93.2229995727539