Year	% gross
1970	118.501472473145
1971	124.972938537598
1972	125.477981567383
1973	126.309051513672
1974	125.581062316895
1975	122.381813049316
1976	118.802337646484
1977	117.355438232422
1978	116.374588012695
1979	115.935173034668
1980	112.794906616211
1981	110.72917175293
1982	107.89769744873
1983	106.677803039551
1984	103.097160339355
1985	103.287773132324
1986	101.71671295166
1989	100.792472839355
1990	102.202522277832
1991	102.412590026855
1992	99.5829391479492
1993	100.093887329102
1996	100.278411865234
1997	78.3384399414062
1998	103.025650024414
1999	104.030990600586
2000	100.117050170898
2002	100.046798706055
2003	99.7633819580078
2004	103.114356994629
2005	102.915649414062
2006	103.212860107422
2007	103.789070129395
2008	103.996726989746
2009	103.101181030273
2010	101.699569702148
2011	101.490341186523
2012	101.700302124023
2013	100.460571289062
2014	100.339599609375
2015	100.142440795898
2016	100.067169189453
2017	99.9299392700195
2018	100.067543029785
2019	99.7784881591797
2020	98.1135864257812
2021	97.7342224121094
2022	98.6356506347656