Year	% gross
1970	106.857986450195
1971	106.85848236084
1972	106.205406188965
1973	104.892631530762
1974	105.389122009277
1975	104.558860778809
1976	103.800491333008
1977	103.114891052246
1978	102.208442687988
1979	100.964576721191
1980	99.2814712524414
1981	97.9622192382812
1982	98.567512512207
1983	98.6659698486328
1984	98.8269271850586
1985	98.9060974121094
1986	98.9944686889648
1987	99.7193222045898
1988	99.5622634887695
1989	98.9474716186523
1990	97.4399337768555
1991	96.2048568725586
1992	96.6309280395508
1993	97.2000122070312
1994	97.6153030395508
1995	97.6743011474609
1996	99.0018310546875
1997	100.195068359375
1998	101.79029083252
1999	101.806793212891
2000	101.705642700195
2001	102.423492431641
2002	102.622200012207
2003	102.354331970215
2004	102.429832458496
2005	101.761756896973
2006	101.207748413086
2007	100.405242919922
2008	99.5226593017578
2009	99.5861968994141
2010	99.6034622192383
2011	99.444221496582
2012	99.6174697875977
2013	98.537483215332
2014	97.7452087402344
2015	96.8248062133789
2016	96.0607070922852
2017	95.7524337768555
2018	95.0842132568359
2019	95.518440246582
2020	91.2583465576172
2021	95.8092727661133
2022	95.7385864257812