Year	% gross
1970	5.49903011322021
1971	5.49612998962402
1972	5.87942981719971
1973	6.38995981216431
1974	6.81181001663208
1975	7.40405988693237
1976	8.15345001220703
1977	8.88436985015869
1978	9.34498023986816
1979	9.51924991607666
1980	9.98326969146729
1981	10.5837097167969
1982	11.0247097015381
1983	11.2854299545288
1984	11.6278800964355
1985	11.7033700942993
1986	12.1059904098511
1987	12.282190322876
1988	12.4444198608398
1989	12.2509098052979
1990	12.3860101699829
1991	12.2817401885986
1992	12.9911804199219
1993	13.9001398086548
1994	14.4907703399658
1995	15.3150701522827
1996	16.5033493041992
1997	17.3666095733643
1998	18.1170291900635
1999	19.3275299072266
2000	19.6129302978516
2001	20.259880065918
2002	20.7680797576904
2003	21.2010803222656
2004	22.5583801269531
2005	23.6931800842285
2006	24.5409507751465
2007	26.0503406524658
2008	27.8670902252197
2009	28.4211196899414
2010	30.2528800964355
2011	30.9490394592285
2012	33.1628112792969
2013	34.7755088806152
2014	37.3951187133789
2015	39.6341896057129
2016	39.4731597900391
2017	40.1093788146973
2018	40.4273414611816
2019	40.74462890625
2020	40.7242088317871
2021	40.9108390808105
2022	40.9627914428711