Year	% gross
1970	5.20271015167236
1971	5.19819021224976
1972	5.25100994110107
1973	5.33289003372192
1974	5.50011014938354
1975	5.7181601524353
1976	5.94428014755249
1977	6.09900999069214
1978	6.27406978607178
1979	6.58508014678955
1980	6.84150981903076
1981	7.02292013168335
1982	7.06065988540649
1983	7.06414985656738
1984	7.08800983428955
1985	7.08992004394531
1986	7.23616981506348
1987	7.36425018310547
1988	7.31802988052368
1989	7.3956298828125
1990	7.46716976165771
1991	7.54469013214111
1992	7.60681009292603
1993	7.76476001739502
1994	8.18982982635498
1995	8.65145969390869
1996	9.35591983795166
1997	10.125340461731
1998	10.9697999954224
1999	11.9494495391846
2000	12.8130598068237
2001	13.7179899215698
2002	15.0267295837402
2003	16.1311492919922
2004	17.1176891326904
2005	18.1001892089844
2006	19.451789855957
2007	20.5295295715332
2008	21.8013706207275
2009	22.7915096282959
2010	24.1795291900635
2011	25.9513092041016
2012	27.5210094451904
2013	28.705249786377
2014	31.7011604309082
2015	32.9464683532715
2016	33.7294998168945
2017	34.223949432373
2018	34.8227386474609
2019	35.961109161377
2020	37.1330718994141
2021	38.5585289001465
2022	39.2520904541016