Year	% gross
1970	99.7804412841797
1971	102.445922851562
1972	104.736167907715
1973	106.093849182129
1974	107.71346282959
1975	107.533500671387
1976	106.337409973145
1977	105.518852233887
1978	104.346900939941
1979	102.612030029297
1980	102.286682128906
1981	102.562080383301
1983	102.174087524414
1984	102.276512145996
1985	102.193138122559
1986	101.394050598145
1987	99.2037582397461
1991	99.3393478393555
1992	98.8196868896484
1994	100.483459472656
1995	99.9219512939453
1996	97.6858520507812
1997	98.4800796508789
1998	99.8063430786133
1999	99.6403732299805
2000	98.6486511230469
2001	100.345779418945
2002	100.577667236328
2003	99.9544219970703
2004	100.187759399414
2006	98.7571868896484
2007	93.4644775390625
2008	93.7172470092773
2009	92.1352233886719
2011	92.8064193725586
2012	94.023307800293
2013	95.2590026855469
2014	94.9049987792969
2015	96.3669967651367
2016	96.7990036010742
2017	98.5749969482422
2018	101.091003417969
2019	108.329933166504
2020	108.846000671387
2021	107.843002319336
2022	105.470001220703