Year	% gross
1970	72.287239074707
1971	72.2885208129883
1972	75.125617980957
1973	76.8178482055664
1974	77.5331573486328
1975	80.4156875610352
1976	82.651123046875
1977	83.8849792480469
1978	84.7230606079102
1979	83.8344802856445
1980	86.7679901123047
1981	85.8819427490234
1982	87.6211776733398
1983	88.6613464355469
1984	89.8379516601562
1985	89.6614074707031
1986	90.5144805908203
1987	91.5119323730469
1988	92.4500732421875
1989	92.2427291870117
1990	93.8023071289062
1991	94.5359802246094
1992	91.9800720214844
1993	92.0542068481445
1994	93.920036315918
1995	92.1974334716797
1996	94.1169662475586
1997	94.273681640625
1998	94.7903213500977
1999	95.269157409668
2000	95.4096374511719
2001	96.1159210205078
2002	97.2204284667969
2003	98.3940734863281
2004	99.2013397216797
2005	99.3212585449219
2006	100.166107177734
2007	100.481407165527
2008	100.282928466797
2009	100.350898742676
2010	100.467193603516
2011	99.9253768920898
2012	101.210868835449
2013	101.332733154297
2014	98.3075790405273
2015	97.7787399291992
2016	97.351921081543
2017	97.527099609375
2018	97.7222595214844
2019	98.0530471801758
2020	98.4550399780273
2021	98.3956604003906
2022	96.7881469726562