Year	% gross
1970	72.3935928344727
1971	72.3920822143555
1972	75.2127914428711
1973	76.893440246582
1974	77.6042022705078
1975	80.4667205810547
1976	82.6862564086914
1977	83.9111709594727
1978	84.7433013916016
1979	83.8611831665039
1980	86.7737884521484
1981	85.8941116333008
1982	87.6208724975586
1983	88.6535263061523
1984	89.821533203125
1985	89.6461410522461
1986	90.493293762207
1987	91.4838562011719
1988	92.4142227172852
1989	92.2083282470703
1990	93.7544097900391
1991	94.482780456543
1992	91.9459686279297
1993	92.018928527832
1994	93.8688507080078
1995	92.1589508056641
1996	94.0766983032227
1997	94.2502365112305
1998	94.7786026000977
1999	95.2706527709961
2000	95.4306335449219
2001	96.1318588256836
2002	97.2178421020508
2003	98.3693084716797
2004	99.130859375
2005	99.2424011230469
2006	100.055526733398
2007	100.359497070312
2008	100.164482116699
2009	100.230247497559
2010	100.355140686035
2011	99.8286514282227
2012	101.118202209473
2013	101.244567871094
2014	98.2714080810547
2015	97.7537307739258
2016	97.336181640625
2017	97.5254898071289
2018	97.7120132446289
2019	98.0321426391602
2020	98.4207763671875
2021	98.3408126831055
2022	96.7356109619141