Year	% gross
1970	18.0005493164062
1971	18.2410793304443
1972	18.6832695007324
1973	19.0887298583984
1974	19.1868801116943
1975	19.5051803588867
1976	19.6632308959961
1977	20.0926990509033
1978	20.6313400268555
1979	21.1369895935059
1980	22.209789276123
1981	22.3754100799561
1982	23.4503402709961
1983	24.6317901611328
1984	25.3937702178955
1985	25.743839263916
1986	25.5261192321777
1987	26.0916690826416
1988	26.1009197235107
1989	25.860279083252
1990	25.6815395355225
1991	26.6198596954346
1992	27.3044204711914
1993	27.4431896209717
1994	27.774730682373
1995	28.3861103057861
1996	28.6074295043945
1997	28.9027194976807
1998	29.5268592834473
1999	29.9573307037354
2000	30.6778507232666
2001	31.7027606964111
2002	32.5642204284668
2003	33.5823211669922
2004	34.5987586975098
2005	35.1736793518066
2006	36.6932983398438
2007	37.5622787475586
2008	38.8989181518555
2009	40.4629516601562
2010	42.0451698303223
2011	42.998950958252
2012	44.1503295898438
2013	45.7012481689453
2014	45.1332015991211
2015	45.9111595153809
2016	46.3772087097168
2017	46.3702583312988
2018	47.3106689453125
2019	47.7851486206055
2020	48.150520324707
2021	48.1482009887695
2022	47.942138671875