Year	% gross
1971	103.800277709961
1972	104.175201416016
1973	104.157257080078
1974	104.46263885498
1975	104.530059814453
1976	104.941627502441
1977	105.156112670898
1978	105.276458740234
1979	105.554023742676
1980	105.782043457031
1981	105.58943939209
1982	105.488693237305
1983	105.609100341797
1984	105.906089782715
1985	104.44970703125
1986	104.196548461914
1987	103.773368835449
1988	103.509727478027
1989	102.895378112793
1990	103.281341552734
1991	103.865837097168
1992	104.002258300781
1998	100.317176818848
1999	100.59831237793
2000	100.63703918457
2001	100.971603393555
2002	100.711959838867
2003	100.633613586426
2004	105.937881469727
2005	105.762718200684
2006	104.645713806152
2007	103.295936584473
2008	105.51734161377
2009	105.265823364258
2010	105.363639831543
2011	104.91185760498
2012	105.829238891602
2013	105.331489562988
2014	99.8664703369141
2015	99.7889785766602
2016	99.5013809204102
2017	99.3302307128906
2018	99.2399291992188
2019	99.1023330688477
2020	98.588623046875
2021	102.15885925293
2022	98.5782012939453