Year	% gross
1970	6.53341007232666
1971	6.3530797958374
1972	6.36504983901978
1973	6.43776988983154
1974	6.68069982528687
1975	7.0213098526001
1976	7.44240999221802
1977	7.69158983230591
1978	7.8882098197937
1979	8.53106021881104
1980	9.09597969055176
1981	9.37650012969971
1982	9.23793983459473
1983	8.90878963470459
1984	8.48867034912109
1985	8.26692008972168
1986	8.62720966339111
1987	8.77212047576904
1988	8.73810958862305
1989	8.6456298828125
1990	8.6334400177002
1991	8.52618980407715
1992	8.53022003173828
1993	8.71298027038574
1994	9.51836967468262
1995	10.3891897201538
1996	11.4001998901367
1997	12.6135101318359
1998	13.699649810791
1999	14.7576503753662
2000	16.0366096496582
2001	17.8516597747803
2002	20.201789855957
2003	22.5849208831787
2004	24.439510345459
2005	26.2299098968506
2006	28.1061706542969
2007	28.9630107879639
2008	29.7443695068359
2009	30.7319602966309
2010	32.5460014343262
2011	34.1190986633301
2012	36.0709800720215
2013	38.6193084716797
2014	46.0442085266113
2015	48.3860092163086
2016	49.7676811218262
2017	51.0158309936523
2018	52.6908187866211
2019	54.8725814819336
2020	58.3144607543945
2021	62.1221885681152
2022	65.0663909912109