Year	% gross
1970	109.96150970459
1971	105.07984161377
1972	102.054580688477
1973	103.040229797363
1974	102.081237792969
1975	106.718772888184
1976	110.878791809082
1977	110.12809753418
1978	107.845840454102
1979	107.96826171875
1980	107.967910766602
1981	109.882499694824
1982	111.225578308105
1983	113.74072265625
1984	115.980438232422
1985	120.713172912598
1986	123.852569580078
1987	125.43775177002
1988	123.416053771973
1989	120.302177429199
1990	115.242156982422
1991	113.194892883301
1992	111.539642333984
1993	110.477546691895
1994	109.930328369141
1995	110.218826293945
1996	109.783470153809
1997	109.690650939941
1998	109.521507263184
1999	110.81893157959
2000	112.050689697266
2001	113.034530639648
2002	111.806777954102
2003	110.615501403809
2004	109.481727600098
2005	108.078941345215
2006	106.447906494141
2007	106.955810546875
2008	107.297241210938
2009	107.20140838623
2010	106.640472412109
2011	106.313606262207
2012	106.258567810059
2013	105.542297363281
2014	102.495170593262
2015	101.66072845459
2016	101.388786315918
2017	101.171943664551
2018	100.790786743164
2019	100.860092163086
2020	101.385246276855
2021	101.658416748047
2022	102.12483215332