Year	% gross
1970	75.8903121948242
1971	74.8026580810547
1972	74.8307113647461
1973	76.6321868896484
1974	76.6767501831055
1975	80.9556121826172
1976	83.8229827880859
1977	84.9145126342773
1978	83.8897094726562
1979	84.6719589233398
1980	85.5138931274414
1981	86.6562194824219
1982	87.3932037353516
1983	88.2295913696289
1984	89.5202789306641
1985	90.5934219360352
1986	91.9927368164062
1987	91.9151306152344
1988	91.9653625488281
1989	91.4466018676758
1990	90.3951187133789
1991	90.1365280151367
1992	89.9018478393555
1993	90.3351669311523
1994	90.817741394043
1995	90.9544372558594
1996	90.8108520507812
1997	91.7461700439453
1998	92.0392608642578
1999	92.9030075073242
2000	93.9218292236328
2001	94.5754013061523
2002	95.0906219482422
2003	98.0343017578125
2004	98.9726409912109
2005	99.5248107910156
2006	99.7558517456055
2007	100.862426757812
2008	101.538093566895
2009	101.577857971191
2010	100.90894317627
2011	100.779640197754
2012	101.654823303223
2013	102.986938476562
2014	101.447593688965
2015	101.11946105957
2016	102.860069274902
2017	102.361320495605
2018	98.1728286743164
2019	98.4054107666016
2020	99.0506362915039
2021	99.0713195800781
2022	100.561256408691