Year	% gross
1970	109.301597595215
1971	109.444122314453
1972	110.871688842773
1973	109.415107727051
1974	110.107849121094
1975	106.526428222656
1976	105.740928649902
1977	107.594909667969
1978	107.290817260742
1979	107.082153320312
1980	105.046768188477
1981	104.110511779785
1982	105.384750366211
1983	105.517181396484
1984	104.192420959473
1985	103.381301879883
1986	101.736602783203
1987	101.590538024902
1988	100.960662841797
1989	102.021369934082
1990	100.567810058594
1991	99.6140213012695
1992	99.9882431030273
1993	100.171112060547
1994	100.961853027344
1995	100.332069396973
1996	99.672248840332
1997	99.1933364868164
1998	98.5701522827148
1999	97.2249984741211
2000	98.1237564086914
2001	97.530647277832
2002	96.5161209106445
2003	97.0875930786133
2004	98.6504516601562
2005	98.8141632080078
2006	99.0015182495117
2007	98.8930206298828
2008	101.840927124023
2009	102.104072570801
2010	100.952362060547
2011	101.735237121582
2012	101.615837097168
2013	100.487922668457
2014	99.3408126831055
2015	99.2116622924805
2016	98.8228912353516
2017	98.831413269043
2018	99.5032806396484
2019	97.6818237304688
2020	96.8901290893555
2021	95.7902984619141
2022	95.2372512817383