Year	% gross
1971	81.2763137817383
1972	83.3147811889648
1973	84.1650314331055
1974	84.7000885009766
1975	83.9881286621094
1976	84.0455703735352
1977	84.5709075927734
1978	86.8461608886719
1979	88.2496185302734
1980	89.0497436523438
1981	90.0260009765625
1982	92.1702880859375
1983	91.9453811645508
1984	95.0437622070312
1985	97.0066299438477
1986	99.1071166992188
1987	99.8968963623047
1988	101.854431152344
1989	103.129890441895
1990	103.92797088623
1991	104.277603149414
1992	104.594192504883
1993	138.554214477539
1994	139.153335571289
1995	139.01237487793
1996	139.110366821289
1999	137.772491455078
2000	139.842025756836
2001	147.875823974609
2002	148.898376464844
2003	151.278259277344
2004	144.644546508789
2005	148.750213623047
2006	149.523162841797
2007	149.550140380859
2008	149.599426269531
2009	148.647155761719
2010	150.430969238281
2011	149.166290283203
2012	149.456817626953
2013	151.471527099609
2014	152.403884887695
2015	153.776382446289
2016	151.450653076172
2017	149.590728759766
2018	147.499465942383
2019	147.651336669922
2020	143.001113891602
2021	136.114044189453