Year	% gross
1970	32.8611183166504
1971	32.9339218139648
1972	33.4399795532227
1973	33.8309516906738
1974	34.0422286987305
1975	34.450740814209
1976	34.7848281860352
1977	35.7318115234375
1978	36.4150085449219
1979	37.3818817138672
1980	38.7116203308105
1981	39.4354095458984
1982	40.925479888916
1983	42.2357406616211
1984	44.0832595825195
1985	44.5751304626465
1986	44.7950210571289
1987	44.8232192993164
1988	44.6315116882324
1989	44.5937614440918
1990	45.9730186462402
1991	47.4520492553711
1992	48.8422889709473
1993	50.1042785644531
1994	50.5121688842773
1995	50.5778617858887
1996	50.5541915893555
1997	50.7911682128906
1998	49.9600715637207
1999	49.1197509765625
2000	50.3356513977051
2001	50.8088493347168
2002	51.8899383544922
2003	52.5146102905273
2004	53.7091484069824
2005	54.5393981933594
2006	55.140869140625
2007	56.0583000183105
2008	57.5436515808105
2009	57.3397216796875
2010	59.6222610473633
2011	61.5331611633301
2012	63.2333717346191
2013	63.2393112182617
2014	65.1052322387695
2015	65.3201370239258
2016	66.0351028442383
2017	65.217170715332
2018	66.1039581298828
2019	66.3776473999023
2020	67.9046325683594
2021	69.6253280639648
2022	69.3051376342773