Year	% gross
1970	49.6279296875
1971	49.6220817565918
1972	50.2787399291992
1973	49.523738861084
1974	48.5434494018555
1975	51.7949714660645
1976	54.8269386291504
1977	53.444091796875
1978	54.2747993469238
1979	53.7925300598145
1980	54.8792190551758
1981	57.2137794494629
1982	58.7267913818359
1983	59.3995895385742
1984	60.5708885192871
1985	61.0496711730957
1986	62.4370307922363
1987	65.1078491210938
1988	67.5888977050781
1989	69.2309112548828
1990	71.5944519042969
1991	73.1778335571289
1992	77.4639511108398
1993	78.4823989868164
1994	79.4912414550781
1995	80.5201187133789
1996	79.8092193603516
1997	74.581672668457
1998	69.374641418457
1999	70.0455703735352
2000	71.35986328125
2001	72.7946472167969
2002	74.2248916625977
2003	75.7581176757812
2004	77.2838516235352
2005	78.817008972168
2006	79.8379135131836
2007	80.859489440918
2008	81.8259887695312
2009	82.6834411621094
2010	83.4264907836914
2011	84.4620819091797
2012	85.4185409545898
2013	86.537956237793
2014	86.5766830444336
2015	86.8301391601562
2016	86.9818725585938
2017	86.4678726196289
2018	86.455078125
2019	86.3821029663086
2020	86.2110290527344
2021	84.1582412719727
2022	84.169807434082