Year	% gross
1971	111.959739685059
1972	113.861679077148
1973	110.782989501953
1974	114.026916503906
1975	106.067863464355
1976	105.129013061523
1977	103.803909301758
1978	104.095123291016
1979	105.266510009766
1980	103.92960357666
1981	103.57347869873
1982	105.571960449219
1983	105.925422668457
1984	104.656158447266
1985	102.967262268066
1986	101.040542602539
1987	101.796310424805
1988	98.9697036743164
1989	99.7330017089844
1990	98.9966735839844
1991	98.3462219238281
1993	94.6409606933594
1999	89.9577407836914
2000	91.7972869873047
2001	92.0556488037109
2002	92.3488388061523
2003	91.4602127075195
2004	93.9234924316406
2005	93.8925933837891
2007	95.0590972900391
2008	100.566452026367
2009	102.665077209473
2010	99.7643890380859
2011	100.875312805176
2012	100.956787109375
2013	99.3819198608398
2014	96.3857269287109
2015	95.2253189086914
2016	94.3311004638672
2017	94.4400329589844
2018	97.2939224243164
2019	93.3932723999023
2020	89.8730773925781
2021	90.6446075439453
2022	90.7408676147461