Year	% gross
1970	13.1202297210693
1971	13.1514701843262
1972	13.5188398361206
1973	13.9185104370117
1974	14.2358503341675
1975	14.6051502227783
1976	14.6956996917725
1977	15.0661401748657
1978	15.4233903884888
1979	16.0952701568604
1980	17.0249004364014
1981	17.7101306915283
1982	18.6219501495361
1983	21.0927200317383
1984	21.1495800018311
1985	21.9322109222412
1986	22.9269409179688
1987	23.1079406738281
1988	23.5331401824951
1989	24.0707397460938
1990	25.630729675293
1991	27.7860794067383
1992	29.8879699707031
1993	31.7417793273926
1994	32.750301361084
1995	33.0078582763672
1996	33.4978981018066
1997	34.6105804443359
1998	34.5340309143066
1999	34.3599090576172
2000	35.7837791442871
2001	36.2792892456055
2002	38.172679901123
2003	41.0423583984375
2004	41.8401908874512
2005	44.0102882385254
2006	45.4146614074707
2007	47.7069091796875
2008	50.4524993896484
2009	51.1631088256836
2010	54.097339630127
2011	56.8288612365723
2012	59.1681518554688
2013	60.7544097900391
2014	65.100959777832
2015	65.3098678588867
2016	66.9188385009766
2017	65.6878662109375
2018	67.1741180419922
2019	67.4546279907227
2020	68.6478881835938
2021	69.8394470214844
2022	71.2004699707031