Year	% gross
1970	101.446418762207
1971	103.11644744873
1972	103.55973815918
1973	104.367858886719
1974	104.460746765137
1975	104.090103149414
1976	98.9111099243164
1977	100.79776763916
1978	102.272270202637
1979	100.406257629395
1980	96.8743591308594
1981	97.4892807006836
1982	97.6354064941406
1983	98.0471878051758
1984	98.0424499511719
1985	98.4804916381836
1986	100.971282958984
1987	99.9586563110352
1988	99.8123016357422
1989	101.543006896973
1991	106.838706970215
1992	105.58952331543
1993	107.267440795898
1994	111.757957458496
1995	110.496490478516
1996	110.313697814941
1997	108.746017456055
1998	108.935882568359
1999	111.141372680664
2000	110.33251953125
2001	104.55834197998
2002	100.815277099609
2003	96.4435119628906
2004	92.3289413452148
2005	95.7195129394531
2006	96.0935821533203
2007	99.725959777832
2008	101.955238342285
2009	103.794700622559
2010	104.70987701416
2011	105.493713378906
2012	103.313468933105
2013	101.562866210938
2014	100.346740722656
2015	100.225067138672
2016	97.7899322509766
2017	97.4989166259766
2018	98.6400299072266
2019	97.2153015136719
2020	97.9071731567383
2021	96.742057800293
2022	98.0049896240234