Year	% gross
1970	94.1151733398438
1971	93.738899230957
1972	95.4955825805664
1973	96.3507614135742
1974	98.2905502319336
1975	98.3856506347656
1976	98.9369964599609
1977	99.5928573608398
1978	99.6694107055664
1979	99.125617980957
1980	99.0468292236328
1981	99.4270324707031
1982	99.6521530151367
1983	99.8148803710938
1984	99.5859298706055
1985	99.8099517822266
1986	98.847297668457
1987	99.3562393188477
1988	99.1307907104492
1989	98.9274597167969
1990	97.2580871582031
1991	96.9860076904297
1992	96.320182800293
1993	96.1136474609375
1994	96.9005737304688
1995	97.0780181884766
1996	96.5164794921875
1997	96.536750793457
1998	96.8864593505859
1999	96.2234420776367
2000	97.9013671875
2001	98.8970108032227
2002	99.1927795410156
2003	100.13646697998
2004	100.869583129883
2005	101.267036437988
2006	102.2763671875
2007	101.969688415527
2008	103.10523223877
2009	103.086273193359
2010	103.153388977051
2011	102.940361022949
2012	103.077461242676
2013	102.616218566895
2014	102.135101318359
2015	102.156852722168
2016	101.796279907227
2017	101.915351867676
2018	101.988098144531
2019	102.177421569824
2020	102.175048828125
2021	101.787208557129
2022	101.928497314453