Year	% gross
1970	91.7871322631836
1971	90.3708267211914
1972	90.2567901611328
1973	92.400260925293
1974	92.4009475708008
1975	94.9438018798828
1976	96.8492279052734
1977	97.5248870849609
1978	96.2676620483398
1979	97.0952224731445
1980	97.7771072387695
1981	98.9610595703125
1982	100.100067138672
1983	101.394828796387
1984	102.620780944824
1985	103.659973144531
1986	104.395309448242
1987	103.896850585938
1988	103.665687561035
1989	103.083076477051
1990	101.637466430664
1991	100.533920288086
1992	99.9664993286133
1993	100.132247924805
1994	100.340911865234
1995	100.072273254395
1996	99.7205505371094
1997	99.9649963378906
1998	100.106147766113
1999	101.000961303711
2000	101.882797241211
2001	102.055358886719
2002	102.003700256348
2003	103.640380859375
2004	104.250343322754
2005	104.314888000488
2006	103.99683380127
2007	104.781723022461
2008	104.449569702148
2009	104.164306640625
2010	103.277763366699
2011	103.044486999512
2012	103.682670593262
2013	104.154289245605
2014	102.37622833252
2015	102.087661743164
2016	103.350532531738
2017	102.770286560059
2018	99.1907730102539
2019	99.1224899291992
2020	99.6848678588867
2021	99.8832397460938
2022	101.768630981445