Year	% gross
1971	102.424240112305
1972	101.574760437012
1973	103.030296325684
1974	90.1607131958008
1975	99.4367828369141
1976	105.585906982422
1977	113.031028747559
1978	117.519401550293
1979	120.723640441895
1980	111.564971923828
1981	112.549926757812
1982	110.443389892578
1983	108.248947143555
1984	114.397666931152
1985	110.468193054199
1989	114.850936889648
1990	110.16227722168
1992	105.362571716309
1999	101.608306884766
2000	100.284896850586
2001	101.293838500977
2002	100.541343688965
2003	101.019859313965
2004	99.2094497680664
2005	99.5997467041016
2006	99.328010559082
2007	100.342742919922
2008	100.665046691895
2009	100.206756591797
2010	100.170890808105
2011	99.4098968505859
2014	95.9658737182617
2015	95.3062210083008
2016	96.7069625854492
2017	95.4060897827148
2018	96.4081268310547
2019	97.152702331543
2020	98.1787567138672
2021	96.7766265869141
2022	94.0244674682617