Year	% gross
1970	7.51266002655029
1971	7.46509981155396
1972	7.95066976547241
1973	8.58957004547119
1974	9.13953018188477
1975	9.9240198135376
1976	10.8673801422119
1977	11.9771299362183
1978	12.5362100601196
1979	12.5647497177124
1980	13.1274995803833
1981	13.8703098297119
1982	14.2876100540161
1983	14.5270395278931
1984	14.9587602615356
1985	14.837869644165
1986	15.4826898574829
1987	15.7496995925903
1988	15.6087398529053
1989	15.193920135498
1990	15.1059999465942
1991	14.6843099594116
1992	15.4252195358276
1993	16.3465595245361
1994	17.0150203704834
1995	17.8875904083252
1996	19.2701206207275
1997	20.0235805511475
1998	20.6089191436768
1999	21.537130355835
2000	21.4128799438477
2001	21.6114807128906
2002	21.6722106933594
2003	21.3301792144775
2004	22.7863807678223
2005	23.6546993255615
2006	24.2435607910156
2007	26.07008934021
2008	27.2446098327637
2009	28.3486309051514
2010	30.2200508117676
2011	30.1878700256348
2012	31.9289608001709
2013	33.5098991394043
2014	36.0457382202148
2015	38.465690612793
2016	37.2435302734375
2017	37.6553115844727
2018	37.5200881958008
2019	37.5630302429199
2020	37.5796890258789
2021	37.4486083984375
2022	37.3015213012695