Year	% gross
1971	103.949966430664
1972	104.346748352051
1973	104.315200805664
1974	104.621658325195
1975	104.634101867676
1976	104.992431640625
1977	105.121170043945
1978	105.153373718262
1979	105.365219116211
1980	105.53636932373
1981	105.307441711426
1982	105.170211791992
1983	105.347358703613
1984	105.900871276855
1985	104.276153564453
1986	104.098617553711
1987	103.699638366699
1988	103.454193115234
1989	102.728530883789
1990	103.106811523438
1991	103.510917663574
1992	103.805130004883
1998	100.319450378418
1999	100.515991210938
2000	100.586212158203
2001	100.924812316895
2002	100.685401916504
2003	100.590728759766
2004	105.933418273926
2005	105.795600891113
2006	104.345169067383
2007	103.095520019531
2008	105.734230041504
2009	105.418571472168
2010	105.673393249512
2011	105.033470153809
2012	105.829811096191
2013	105.381309509277
2014	99.8948211669922
2015	99.7858428955078
2016	99.4976501464844
2017	99.3491973876953
2018	99.2638092041016
2019	99.1310195922852
2020	98.5916595458984
2021	102.179847717285
2022	98.5245819091797