Year	% gross
1970	10.8966197967529
1971	11.2067203521729
1972	11.7292003631592
1973	12.2510299682617
1974	12.6932096481323
1975	13.3390302658081
1976	14.0943698883057
1977	14.9469499588013
1978	16.1546497344971
1979	17.8836708068848
1980	20.3824100494385
1981	22.8233699798584
1982	25.212760925293
1983	29.4299697875977
1984	32.8340492248535
1985	30.9564609527588
1986	27.2948894500732
1987	26.6073093414307
1988	26.206470489502
1989	24.9253902435303
1990	25.2995891571045
1991	25.1933403015137
1992	25.1922302246094
1993	25.1031303405762
1994	25.0321598052979
1995	25.0071792602539
1996	24.8549995422363
1997	24.6512908935547
1998	24.7468109130859
1999	24.7879390716553
2000	26.2805805206299
2001	28.1912307739258
2002	30.5592803955078
2003	32.1847114562988
2004	33.8945999145508
2005	34.4519004821777
2006	34.8610305786133
2007	35.3102684020996
2008	37.5780410766602
2009	40.021068572998
2010	43.2522315979004
2011	45.364559173584
2012	46.114631652832
2013	51.0829200744629
2014	46.939208984375
2015	47.7793312072754
2016	46.2330017089844
2017	45.864429473877
2018	45.7274589538574
2019	46.2771186828613
2020	46.7658882141113
2021	47.2931289672852
2022	46.709171295166