Year	% gross
1970	2.36501002311707
1971	2.49194002151489
1972	2.53748989105225
1973	2.84044003486633
1974	2.81919002532959
1975	2.98589992523193
1976	3.41400003433228
1977	4.05124998092651
1978	4.36294984817505
1981	8.57324981689453
1982	8.06427001953125
1984	9.216139793396
1985	8.91944980621338
1986	8.53868961334229
1988	9.390700340271
1991	12.8384399414062
1993	9.80504989624023
1994	10.369930267334
1995	12.4164800643921
2001	0
2003	7.02606010437012
2004	6.4032998085022
2005	9.69524955749512
2006	15.4039602279663
2007	15.4865598678589
2008	22.9091300964355
2009	28.3921394348145
2010	33.0184593200684
2011	36.8177490234375
2012	38.4143714904785
2013	38.6094017028809
2014	38.4738616943359
2015	37.8936614990234
2016	38.6336212158203
2017	39.848690032959
2018	41.1315994262695