Year	% gross
1971	88.8289031982422
1972	89.546989440918
1973	89.7787094116211
1974	89.397819519043
1975	90.3556594848633
1976	92.7967681884766
1977	95.1557998657227
1978	95.5625534057617
1979	95.6068420410156
1980	94.6037826538086
1982	105.112152099609
1983	102.990760803223
1984	98.1209182739258
1985	95.614128112793
1986	93.2772369384766
1987	100.114608764648
1988	98.0490798950195
1989	89.3990020751953
1990	86.9231719970703
1991	89.0280303955078
1992	89.6802673339844
1993	93.9775390625
1994	94.5018768310547
1995	99.2854766845703
1996	102.920776367188
1997	92.2096481323242
1998	86.3368225097656
1999	86.4877777099609
2000	90.1869430541992
2001	96.0028305053711
2002	96.5834121704102
2003	97.2614288330078
2004	96.1095199584961
2005	96.7818069458008
2006	98.0861129760742
2007	98.2276916503906
2008	98.6582107543945
2009	98.4950180053711
2010	99.010498046875
2011	99.5668029785156
2012	99.93798828125
2013	107.348907470703
2014	106.452461242676
2015	105.372566223145
2016	103.56421661377
2017	102.751281738281
2018	102.012992858887
2019	100.916809082031
2020	99.9065322875977
2021	100.648231506348