Year	% gross
1971	34.3944892883301
1972	43.8561096191406
1973	46.2088584899902
1974	49.2418594360352
1975	53.7125587463379
1976	57.4093017578125
1977	60.3589706420898
1985	52.5153007507324
1988	60.2514610290527
1990	66.5687026977539
1991	66.6249313354492
1992	69.5576782226562
1993	73.6585922241211
1994	77.8349533081055
1995	78.834602355957
1997	80.2533721923828
1999	83.4826965332031
2000	83.8125305175781
2001	83.2780838012695
2002	83.1815719604492
2003	82.6919174194336
2004	80.9082717895508
2005	79.5995407104492
2006	80.1514205932617
2007	78.252067565918
2008	83.078498840332
2009	85.8698883056641
2010	86.1368637084961
2011	90.6289901733398
2012	94.4969100952148
2013	93.5810165405273
2014	94.5571823120117
2015	90.7769470214844
2016	87.3230514526367
2017	86.4118576049805
2020	87.9440536499023