Year	% gross
1970	12.8640098571777
1971	12.9914398193359
1972	13.59494972229
1973	14.1483402252197
1974	14.5812902450562
1975	15.6496200561523
1976	16.4829006195068
1977	17.3298797607422
1978	18.7115898132324
1979	20.3719997406006
1980	22.2192993164062
1981	23.7186603546143
1982	24.8903007507324
1983	26.7506294250488
1984	28.3915691375732
1985	27.8584308624268
1986	25.9092693328857
1987	25.479190826416
1988	24.9556999206543
1989	24.1963195800781
1990	24.1851501464844
1991	24.252269744873
1992	24.2571296691895
1993	24.3778190612793
1994	24.827169418335
1995	24.7117595672607
1996	24.5944404602051
1997	24.553150177002
1998	25.0758590698242
1999	25.3966293334961
2000	26.5458698272705
2001	28.0064697265625
2002	29.3092994689941
2003	30.4210891723633
2004	32.7314910888672
2005	33.3808097839355
2006	34.6447486877441
2007	35.4809913635254
2008	38.0207901000977
2009	40.2077598571777
2010	42.4367294311523
2011	43.4523582458496
2012	44.2474784851074
2013	46.8851013183594
2014	45.555061340332
2015	45.8054885864258
2016	45.3200607299805
2017	45.5062713623047
2018	45.6940612792969
2019	46.0430107116699
2020	46.4953384399414
2021	46.8061218261719
2022	46.5168495178223