Year	% gross
1971	27.8282203674316
1972	28.816219329834
1980	27.876220703125
1984	37.6924591064453
1986	37.3028907775879
1989	29.8978900909424
1990	31.8090305328369
1991	32.5693206787109
1992	33.3989105224609
1993	35.5197296142578
1994	36.2889404296875
1995	37.4951095581055
1996	37.5128288269043
1997	37.5975685119629
1998	46.4153289794922
1999	47.1450881958008
2000	48.5344696044922
2001	48.5348892211914
2002	48.6951789855957
2003	48.680591583252
2004	50.8825912475586
2005	51.9645614624023
2006	51.3669281005859
2007	50.4331398010254
2008	48.5074005126953
2009	46.2749214172363
2010	47.2597198486328
2011	54.4071006774902
2012	60.8975105285645
2013	63.2482681274414
2014	66.8735427856445
2015	69.8453826904297
2016	73.7207336425781
2017	73.6105575561523
2018	73.8786468505859
2019	76.6863021850586
2020	77.9072418212891