Year	% gross
1970	86.8718338012695
1971	85.3996276855469
1972	86.5842590332031
1973	88.9882125854492
1974	91.8113708496094
1975	94.2538833618164
1976	95.8751602172852
1977	96.1404876708984
1978	96.5288467407227
1979	95.8747329711914
1980	96.7236480712891
1981	98.0592803955078
1982	98.3944778442383
1983	98.4499816894531
1984	98.6235580444336
1985	99.0645217895508
1986	98.7506713867188
1987	99.3791427612305
1988	99.1828994750977
1989	98.5595397949219
1990	96.8491363525391
1991	97.1751403808594
1992	96.1395797729492
1993	95.8948135375977
1994	96.9904098510742
1995	97.6447906494141
1996	97.52490234375
1997	97.6266021728516
1998	98.6675262451172
1999	98.2960433959961
2000	100.66397857666
2001	101.738609313965
2002	102.534889221191
2003	103.302917480469
2004	103.819770812988
2005	104.269409179688
2006	105.461196899414
2007	105.019882202148
2008	105.449737548828
2009	105.294067382812
2010	105.513229370117
2011	105.131690979004
2012	105.090667724609
2013	104.589988708496
2014	104.165321350098
2015	103.801612854004
2016	103.499313354492
2017	103.497207641602
2018	103.445411682129
2019	103.589126586914
2020	103.70401763916
2021	103.180740356445
2022	103.434791564941