Year	% gross
1970	87.0033111572266
1971	86.9783782958984
1972	87.9870300292969
1973	87.6560211181641
1974	87.9382171630859
1975	87.100959777832
1976	86.6982727050781
1977	86.6466217041016
1978	86.1213684082031
1979	85.6600494384766
1980	89.1626281738281
1981	89.0232772827148
1982	90.4062423706055
1983	90.5243682861328
1984	91.295051574707
1985	91.1700210571289
1986	92.3223114013672
1987	92.9867095947266
1988	93.4302520751953
1989	94.1159591674805
1990	94.4517822265625
1991	94.8127212524414
1992	95.7300720214844
1993	98.009407043457
1994	100.269912719727
1995	100.051132202148
1996	100.691131591797
1997	100.22331237793
1998	99.0722503662109
1999	99.4580078125
2000	99.7854690551758
2001	100.448699951172
2002	100.944770812988
2003	101.158767700195
2004	100.751792907715
2005	101.519500732422
2006	101.286689758301
2007	101.455307006836
2008	101.897323608398
2009	102.387977600098
2010	103.212783813477
2011	102.960510253906
2012	103.064163208008
2013	105.620422363281
2014	105.7861328125
2015	105.679328918457
2016	105.682518005371
2017	105.845176696777
2018	105.200782775879
2019	105.538070678711
2020	105.192031860352
2021	104.891876220703
2022	104.79386138916