Year	% gross
1973	6.53074979782104
1974	6.78671979904175
1975	7.13531017303467
1976	7.56422996520996
1977	7.83571004867554
1978	7.99445009231567
1979	8.54673004150391
1980	9.0636100769043
1981	9.15163040161133
1982	9.00012016296387
1983	8.69591045379639
1984	8.29096984863281
1985	7.99646997451782
1986	8.22725009918213
1987	8.29349994659424
1988	8.23163986206055
1989	8.17930030822754
1990	8.19629001617432
1991	8.09123992919922
1992	8.16726970672607
1993	8.3987398147583
1994	9.1353702545166
1995	9.98561954498291
1996	11.0832796096802
1997	12.4245500564575
1998	13.606840133667
1999	14.9245100021362
2000	16.3828907012939
2001	18.3138103485107
2002	20.864429473877
2003	23.3374195098877
2004	25.5451908111572
2005	27.375659942627
2006	29.6885795593262
2007	30.9387702941895
2008	32.0785713195801
2009	33.3918304443359
2010	35.6049499511719
2011	37.4891510009766
2012	39.5999908447266
2013	42.48583984375
2014	50.7707405090332
2015	53.5371284484863
2016	55.4878311157227
2017	56.8883590698242
2018	58.9286117553711
2019	61.415470123291
2020	64.8653793334961
2021	68.7129898071289
2022	71.3952865600586