Year	% gross
1970	40.6152381896973
1971	42.1100387573242
1972	44.2631683349609
1973	46.1223907470703
1974	47.2361488342285
1975	47.5844917297363
1976	48.2744102478027
1977	49.0544700622559
1978	48.7867317199707
1979	47.636661529541
1980	46.7583694458008
1981	46.048999786377
1982	45.6995582580566
1983	45.706241607666
1984	46.0674285888672
1985	46.7495498657227
1986	47.6452407836914
1987	48.6031112670898
1988	49.186279296875
1989	49.4940910339355
1990	50.1465911865234
1991	51.3279685974121
1992	52.5189590454102
1993	53.7400093078613
1994	54.4032096862793
1995	55.0042304992676
1996	55.853458404541
1997	56.631721496582
1998	57.027099609375
1999	57.4247093200684
2000	58.3492584228516
2001	59.4154891967773
2002	61.2903289794922
2003	62.0681381225586
2004	63.1498718261719
2005	64.1784286499023
2006	64.7165374755859
2007	66.5234603881836
2008	68.0553665161133
2009	69.1307830810547
2010	70.7240600585938
2011	71.9435806274414
2012	72.748176574707
2013	74.1346282958984
2014	74.9567489624023
2015	74.9790420532227
2016	75.0983810424805
2017	74.7702789306641
2018	75.2986602783203
2019	75.6058120727539
2020	76.2225494384766
2021	76.9791412353516
2022	77.2032623291016