Year	% gross
1970	24.8782997131348
1971	24.7897205352783
1972	25.1736297607422
1973	25.5604190826416
1974	25.6900005340576
1975	25.9561195373535
1976	26.0711307525635
1977	26.2252597808838
1978	26.6506595611572
1979	27.460090637207
1980	28.1068992614746
1981	29.0372905731201
1982	30.261869430542
1983	31.2626495361328
1984	31.9556407928467
1985	32.1660690307617
1986	32.0074501037598
1987	32.1427192687988
1988	31.9510593414307
1989	31.5289001464844
1990	30.6831607818604
1991	30.7380905151367
1992	30.3424892425537
1993	30.037389755249
1994	30.2241592407227
1995	30.5610103607178
1996	30.6323890686035
1997	30.7947101593018
1998	31.1787605285645
1999	31.2968196868896
2000	32.2598609924316
2001	33.463550567627
2002	34.3401985168457
2003	35.7024192810059
2004	37.035530090332
2005	37.3304481506348
2006	38.192138671875
2007	38.3402214050293
2008	40.2025108337402
2009	41.769401550293
2010	43.4450492858887
2011	44.3218803405762
2012	45.3939018249512
2013	46.9632911682129
2014	45.0854911804199
2015	45.3319892883301
2016	44.7550506591797
2017	45.2956008911133
2018	45.7460289001465
2019	46.1323013305664
2020	46.6529083251953
2021	47.0820503234863
2022	46.9338684082031