Year	% gross
1970	14.3238201141357
1971	14.4764995574951
1972	14.9720802307129
1973	15.2534704208374
1974	15.4209604263306
1975	16.2325992584229
1976	16.9654197692871
1977	17.9015007019043
1978	18.7857799530029
1979	19.7335605621338
1980	20.6401805877686
1981	21.5055904388428
1982	21.7173194885254
1983	22.2082996368408
1984	22.2804298400879
1985	22.0200805664062
1986	21.7647094726562
1987	21.6747608184814
1988	22.0807094573975
1989	21.6612606048584
1990	21.5043296813965
1991	21.6629009246826
1992	21.4082107543945
1993	21.461799621582
1994	22.0818099975586
1995	22.2208194732666
1996	22.3298397064209
1997	22.5096492767334
1998	23.4176292419434
1999	24.1695404052734
2000	24.8393898010254
2001	26.0861206054688
2002	27.0782508850098
2003	27.9791507720947
2004	29.8299407958984
2005	31.2478008270264
2006	33.2465782165527
2007	34.9876098632812
2008	37.1389617919922
2009	38.8503913879395
2010	40.4840507507324
2011	41.4388084411621
2012	42.4207496643066
2013	43.2207984924316
2014	43.4917602539062
2015	43.3271217346191
2016	43.6524810791016
2017	43.7959785461426
2018	44.1782188415527
2019	44.3122100830078
2020	44.517650604248
2021	44.5803489685059
2022	44.2253608703613