Year	% gross
1970	38.3291816711426
1971	37.962028503418
1972	40.9304885864258
1973	43.1591911315918
1974	43.5197410583496
1975	45.8549118041992
1976	48.0102615356445
1977	50.3662300109863
1978	52.310359954834
1979	53.5932197570801
1980	55.3532485961914
1981	57.5524101257324
1982	58.8241691589355
1983	58.2798385620117
1984	58.9662399291992
1985	57.0668106079102
1986	57.2299003601074
1987	56.8482284545898
1988	59.4507484436035
1989	59.2723197937012
1990	58.6894989013672
1991	60.78125
1992	60.9603614807129
1993	61.5671501159668
1994	62.5925102233887
1995	63.6223602294922
1996	64.0793228149414
1997	66.9990692138672
1998	67.6537780761719
1999	68.2282180786133
2000	70.6422882080078
2001	73.2795791625977
2002	78.0920181274414
2003	81.722770690918
2004	84.2671966552734
2005	87.9396133422852
2006	90.9600219726562
2007	92.8816833496094
2008	95.7228317260742
2009	96.7366180419922
2010	97.2517166137695
2011	97.4495010375977
2012	98.2222518920898
2013	98.6249618530273
2014	98.8015975952148
2015	98.6021881103516
2016	99.1303329467773
2017	99.6631927490234
2018	100.604187011719
2019	101.677627563477
2020	102.358291625977
2021	101.748458862305
2022	101.651229858398