Year	% gross
1970	120.340057373047
1971	111.981750488281
1972	106.83113861084
1973	107.876022338867
1974	106.179130554199
1975	112.194068908691
1976	117.58203125
1977	115.572227478027
1978	110.883583068848
1979	109.943023681641
1980	108.862922668457
1981	110.818008422852
1982	111.846168518066
1983	115.250068664551
1984	118.229042053223
1985	125.628341674805
1986	131.474822998047
1987	134.326110839844
1988	131.506958007812
1989	126.830001831055
1990	119.836502075195
1991	116.541816711426
1992	113.808631896973
1993	111.76912689209
1994	110.52970123291
1995	111.240463256836
1996	110.350860595703
1997	110.21012878418
1998	109.920471191406
2001	115.909858703613
2006	106.496429443359
2007	106.728660583496
2008	107.430740356445
2009	106.631637573242
2010	105.000213623047
2011	103.869262695312
2012	103.43643951416
2013	102.930908203125
2014	97.9485015869141
2015	97.1544418334961
2016	97.3906173706055
2017	97.922119140625
2018	98.1703567504883
2019	98.2354125976562
2020	99.0244293212891
2021	99.4303970336914
2022	100.171730041504