Year	% gross
1977	65.0624618530273
1978	69.7728729248047
1979	71.8855133056641
1980	74.401481628418
1981	77.0912322998047
1982	79.2719802856445
1983	82.0395202636719
1984	82.6609268188477
1985	84.6598129272461
1986	86.8860778808594
1987	89.2880783081055
1988	91.7596130371094
1989	91.1067276000977
1990	89.9663772583008
1991	90.8988037109375
1992	90.2075881958008
1993	92.1244201660156
1994	93.7511215209961
1995	95.9077377319336
1996	96.6614227294922
1998	95.0344467163086
1999	92.4533309936523
2000	92.4159164428711
2001	92.0064468383789
2002	92.9567031860352
2003	94.4007568359375
2004	94.7845077514648
2005	98.1966934204102
2006	99.7978591918945
2007	99.5271377563477
2008	100.492050170898
2009	102.422790527344
2010	99.3205337524414
2011	100.385513305664
2012	99.4975433349609
2013	102.341499328613
2014	104.578193664551
2015	104.177207946777
2016	104.668266296387
2017	103.106430053711
2018	101.767143249512
2019	101.835868835449
2020	102.304023742676