Year	% gross
1975	55.9658317565918
1976	55.6168785095215
1977	55.015941619873
1978	53.0866203308105
1979	49.5074615478516
1980	44.8128890991211
1981	42.0388717651367
1982	39.6982002258301
1983	38.5893592834473
1984	38.6278686523438
1985	39.7423515319824
1986	40.758228302002
1987	43.1511192321777
1988	44.8768310546875
1989	46.0732917785645
1990	47.1780090332031
1991	49.4379692077637
1992	51.9582099914551
1993	53.7947692871094
1994	55.1866188049316
1995	56.8488807678223
1996	59.415771484375
1997	61.1714096069336
1998	63.2882385253906
1999	64.8877487182617
2000	66.1141128540039
2001	68.4090270996094
2002	72.3456573486328
2003	72.4542083740234
2004	74.7970581054688
2005	77.3043212890625
2006	78.0772018432617
2007	82.3557586669922
2008	85.6901092529297
2009	89.8346176147461
2010	90.9463806152344
2011	92.2311630249023
2012	92.2560501098633
2013	94.6560592651367
2014	93.8499374389648
2015	92.8665924072266
2016	92.1753234863281
2017	91.9253768920898
2018	92.7030334472656
2019	93.6470413208008
2020	94.0784530639648
2021	94.995361328125
2022	95.4836883544922