Year	% gross
1971	19.1810493469238
1972	20.6267108917236
1973	22.809419631958
1974	24.0983600616455
1975	25.2521305084229
1976	33.4008712768555
1977	34.9426803588867
1978	36.4486312866211
1979	38.1584396362305
1980	39.6043395996094
1981	40.9768600463867
1982	42.9630012512207
1984	52.9083290100098
1986	49.7858810424805
1994	41.6412200927734
1995	43.4702110290527
1998	54.2057304382324
1999	56.0141487121582
2000	59.4400787353516
2002	67.816276550293
2004	68.8893127441406
2005	70.5230407714844
2007	79.9215469360352
2008	78.7571563720703
2009	80.7119979858398
2010	77.9718322753906
2011	77.4272232055664
2012	77.9861068725586
2013	79.171501159668
2014	80.1145401000977
2015	79.9378890991211
2016	80.0944671630859
2017	79.9406814575195
2018	80.2159271240234
2019	81.8562393188477
2020	80.0444107055664
2021	75.7044830322266
2022	76.5283203125