Year	% gross
1971	50.8920707702637
1972	48.3960304260254
1973	46.3900184631348
1974	48.3142890930176
1975	51.7478218078613
1976	53.8985595703125
1977	65.2036437988281
1978	66.0703735351563
1979	58.8517913818359
1980	55.1458206176758
1981	58.4597511291504
1982	62.6925392150879
1983	65.9399490356445
1984	67.0068283081055
1985	74.7549362182617
1986	69.702766418457
1987	70.6589889526367
1988	85.1525573730469
1989	84.1755828857422
1990	80.7681503295898
1991	91.1426391601563
1992	76.7232437133789
1993	81.7684707641602
1994	78.7350921630859
1995	88.3132476806641
1996	93.0870590209961
1997	87.499267578125
1998	92.0536193847656
1999	111.630737304688
2000	109.564956665039
2001	110.473266601563
2002	108.671051025391
2003	106.628677368164
2004	106.334587097168
2005	104.634407043457
2006	106.457122802734
2007	107.707077026367
2008	109.84644317627
2009	105.090858459473
2010	101.33228302002
2011	104.0771484375
2013	90.844596862793
2014	99.2385787963867
2015	101.948997497559
2016	104.034812927246
2017	100.599090576172
2018	98.4197998046875
2019	96.6123275756836
2020	97.5704498291016
2021	99.2024612426758