Year	% gross
1971	58.4034614562988
1972	55.9226913452148
1973	57.5355682373047
1974	59.970760345459
1975	63.6163215637207
1976	68.5808868408203
1977	73.3146591186523
1978	78.4692764282227
1979	81.3564682006836
1980	82.3869781494141
1981	84.0454711914062
1982	83.333610534668
1983	83.5428009033203
1984	83.5006103515625
1985	84.7954330444336
1986	80.631721496582
1987	79.2115097045898
1988	77.5503921508789
1989	76.3039093017578
1990	76.371467590332
1991	77.743293762207
1992	78.2036437988281
1993	78.1614074707031
1994	80.2347564697266
1996	85.2594833374023
1999	87.1551971435547
2000	85.8253631591797
2002	85.5369567871094
2003	84.762939453125
2004	83.4828033447266
2005	82.3616104125977
2006	82.5906066894531
2007	76.1370468139648
2008	77.1064605712891
2010	74.0448226928711
2011	73.8749008178711
2012	74.0113677978516
2013	76.3667602539062
2014	70.64453125
2017	61.5583610534668
2018	62.0957183837891
2019	64.5553894042969
2020	65.8310775756836
2021	68.9746627807617
2022	70.9061279296875