Year	% gross
1970	91.9931488037109
1975	100.005073547363
1977	101.39128112793
1978	102.692008972168
1979	102.524261474609
1980	101.86328125
1981	101.21981048584
1982	101.163597106934
1983	101.538070678711
1984	100.881416320801
1985	101.148406982422
1987	100.496726989746
1988	100.882369995117
1989	100.790496826172
1990	100.453346252441
1991	101.093566894531
1992	101.809059143066
1993	101.941467285156
1994	101.821632385254
1995	102.050827026367
1996	102.76148223877
1998	100.795890808105
1999	99.7763137817383
2000	101.561088562012
2001	98.2948989868164
2002	94.6432189941406
2003	94.1330032348633
2004	96.1277236938477
2005	96.882080078125
2006	97.2874221801758
2007	97.7731399536133
2008	98.1771621704102
2009	98.3973999023438
2010	98.6539611816406
2011	99.3450012207031
2012	100.158996582031
2013	101.025001525879
2014	99.8199996948242
2015	98.8000030517578
2016	99.9250030517578
2017	100.66300201416
2018	100.936996459961
2019	101.384002685547
2020	101.866996765137
2021	101.166000366211
2022	97.754997253418