Year	% gross
1971	1.34247994422913
1972	1.36520004272461
1973	1.44359004497528
1974	1.67177999019623
1975	1.74671995639801
1976	1.78394997119904
1977	1.93453001976013
1978	2.00943994522095
1979	2.12686991691589
1980	2.47392988204956
1981	2.64081001281738
1982	2.93271994590759
1983	2.96812009811401
1984	3.19065999984741
1985	3.79249000549316
1986	4.51815986633301
1987	5.14496994018555
1988	5.77653980255127
1989	6.56520986557007
1990	6.84858989715576
1991	7.185959815979
1992	7.39049005508423
1993	7.79690980911255
1994	8.11277008056641
1999	9.37078952789307
2000	9.9255199432373
2001	10.1021995544434
2003	11.3447599411011
2004	12.4341201782227
2005	13.4484701156616
2006	14.2397899627686
2007	15.3694496154785
2008	18.0988502502441
2009	19.5438003540039
2010	21.2837505340576
2011	23.2858791351318
2012	25.3485202789307
2013	27.7329998016357
2014	29.732629776001
2015	33.0902481079102
2016	35.1508483886719
2017	37.3736114501953
2018	39.8208885192871
2019	40.2732582092285
2020	39.4295806884766
2021	38.2898712158203
2022	33.724910736084