Year	% gross
1981	23.3276500701904
1983	25.9518699645996
1985	26.0715808868408
1986	26.4423999786377
1987	27.3452091217041
1988	27.6619491577148
1989	28.3050308227539
1990	27.5592403411865
1991	27.9209003448486
1995	35.3327102661133
1996	36.9716110229492
1997	39.2246017456055
1998	42.1844291687012
1999	48.9726715087891
2000	51.9412994384766
2001	51.7786712646484
2002	52.5634002685547
2003	51.9090194702148
2004	45.1185302734375
2005	45.9740905761719
2006	47.1696510314941
2007	49.493278503418
2008	53.5223083496094
2009	57.8428802490234
2010	61.2268409729004
2011	62.4045906066895
2012	62.1047515869141
2013	61.4689712524414
2014	61.2419509887695
2015	62.2228317260742
2016	63.1158599853516
2017	69.4538192749023
2018	68.9118728637695
2019	70.4619522094727
2020	70.8062896728516