Year	% gross
1970	23.5242805480957
1971	21.8057708740234
1972	20.3760204315186
1973	19.2267799377441
1974	19.1428604125977
1975	20.2492694854736
1976	21.2028102874756
1977	22.6088409423828
1978	22.8709697723389
1979	23.2856903076172
1980	23.1709003448486
1981	23.3779602050781
1982	23.2583103179932
1983	23.5010299682617
1984	23.7647094726562
1985	23.239559173584
1986	23.3431606292725
1987	22.7131500244141
1988	22.3948192596436
1989	20.4845790863037
1990	18.6026802062988
1991	16.2743797302246
1992	14.4361801147461
1993	12.3934698104858
1994	12.8216600418091
1995	14.1589698791504
1996	15.753680229187
1997	17.8041305541992
1998	20.4272193908691
1999	25.9648494720459
2000	29.1881694793701
2001	33.1405296325684
2002	34.6594314575195
2003	36.8122406005859
2004	39.715259552002
2005	43.8617782592773
2006	47.4592208862305
2007	47.763599395752
2008	49.978889465332
2009	53.3564682006836
2010	53.4939994812012
2011	56.7439994812012
2012	58.9900016784668
2013	60.3610000610352
2014	64.2939987182617
2015	68.2350006103516
2016	63.443000793457
2017	61.9049987792969
2018	59.9980010986328
2019	63.4179992675781
2020	64.5479965209961
2021	64.4589996337891
2022	64.3170013427734
2023	65.2785568237305