Year	% gross
1970	108.796127319336
1971	109.042198181152
1972	110.619956970215
1973	108.848037719727
1974	109.337608337402
1975	105.686447143555
1976	105.530197143555
1977	107.176567077637
1978	107.062431335449
1979	106.802268981934
1980	104.93335723877
1981	104.134201049805
1982	104.906982421875
1983	105.214057922363
1984	103.898818969727
1985	103.027488708496
1986	101.057121276855
1987	100.641479492188
1988	100.462242126465
1989	101.711906433105
1990	100.657089233398
1991	99.4548721313477
1992	99.4294509887695
1993	99.2377090454102
1994	100.298362731934
1995	99.6702728271484
1996	99.1612777709961
1997	98.7406311035156
1998	98.0415725708008
1999	96.8178482055664
2000	97.4980773925781
2001	96.7597732543945
2002	95.7793197631836
2003	96.1957702636719
2004	97.6556777954102
2005	97.6245193481445
2006	97.825439453125
2007	97.8289489746094
2008	100.634948730469
2009	100.832153320312
2010	99.5989303588867
2011	100.649726867676
2012	100.775787353516
2013	99.0665969848633
2014	98.1915283203125
2015	99.4701538085938
2016	97.9428100585938
2017	97.9762496948242
2018	98.1997528076172
2019	96.9734802246094
2020	96.2643737792969
2021	95.4677505493164
2022	94.3810424804688