Year	% gross
1970	39.9939117431641
1971	44.8899383544922
1972	50.6662483215332
1973	55.9870109558105
1974	58.7582206726074
1975	58.8984413146973
1976	60.3713798522949
1977	60.745979309082
1978	58.2673301696777
1979	54.8767890930176
1980	50.5008392333984
1981	48.6119117736816
1982	46.3449516296387
1983	44.7922210693359
1984	44.7970504760742
1985	46.1761894226074
1986	47.8357696533203
1987	49.9331016540527
1988	51.7504005432129
1989	52.6081085205078
1990	53.2891693115234
1991	54.9052581787109
1992	56.5347785949707
1993	57.9088592529297
1994	57.7908096313477
1995	59.1351203918457
1996	61.415470123291
1997	63.0469017028809
1998	64.7620086669922
1999	66.1093215942383
2000	66.8743286132812
2001	68.8561401367188
2002	72.0806503295898
2003	72.2244567871094
2004	73.9912109375
2005	75.2934417724609
2006	75.9275665283203
2007	79.9566802978516
2008	82.0881729125977
2009	85.1372528076172
2010	87.5723495483398
2011	88.8612365722656
2012	88.8978118896484
2013	91.7572479248047
2014	91.4166412353516
2015	91.8535003662109
2016	91.4092788696289
2017	92.1793899536133
2018	92.7854232788086
2019	93.5326919555664
2020	93.779411315918
2021	94.2665100097656
2022	94.7364730834961