Year	% gross
1971	102.73796081543
1972	103.092018127441
1973	102.310470581055
1974	101.823501586914
1975	101.974990844727
1976	101.871406555176
1977	103.252723693848
1978	101.651031494141
1979	101.928871154785
1980	102.051780700684
1981	101.016731262207
1982	100.795921325684
1983	100.883750915527
1984	100.243202209473
1985	99.7468338012695
1986	101.788429260254
1987	99.9062118530273
1988	99.3271179199219
1989	98.9008331298828
1990	98.6800689697266
1991	99.317512512207
1992	101.800369262695
1993	103.090591430664
1994	102.913787841797
1995	102.925872802734
1996	102.642890930176
1997	101.887680053711
1998	101.345100402832
1999	101.540962219238
2000	101.86939239502
2001	102.47102355957
2002	102.810722351074
2003	102.384437561035
2004	102.736419677734
2005	102.08748626709
2006	102.310897827148
2007	102.771659851074
2008	102.266273498535
2009	101.361312866211
2010	100.835540771484
2011	100.558326721191
2012	100.335113525391
2013	100.746078491211
2014	100.970321655273
2015	101.104393005371
2016	100.428077697754
2017	101.104568481445
2018	101.370300292969
2019	101.776290893555
2020	101.560852050781
2021	101.644119262695
2022	100.77562713623