Year	% gross
1970	7.9891300201416
1971	8.22605991363525
1972	8.66676998138428
1973	9.1658296585083
1974	9.47126007080078
1975	9.93418979644775
1976	10.4649095535278
1977	11.0670003890991
1978	12.1296396255493
1979	13.3765201568604
1980	15.1089401245117
1981	17.1693000793457
1982	19.236400604248
1983	21.3491992950439
1984	23.1533107757568
1985	23.415979385376
1986	22.195240020752
1987	22.1854190826416
1988	21.8059406280518
1989	20.7317600250244
1990	20.9771595001221
1991	21.0498790740967
1992	21.1501598358154
1993	21.1847496032715
1994	21.2240009307861
1995	21.2823009490967
1996	21.3255004882812
1997	21.3025608062744
1998	21.4341697692871
1999	21.6885604858398
2000	22.7439193725586
2001	24.4286499023438
2002	25.8500003814697
2003	27.6583805084229
2004	29.3260803222656
2005	30.1212501525879
2006	30.4047393798828
2007	30.6056900024414
2008	33.1533699035645
2009	35.7537803649902
2010	38.9419403076172
2011	40.8010292053223
2012	42.2815017700195
2013	47.1461791992188
2014	43.1586494445801
2015	44.3712005615234
2016	42.9465789794922
2017	43.0946807861328
2018	43.3906593322754
2019	44.2955703735352
2020	45.150749206543
2021	45.8504295349121
2022	45.4209289550781