Year	% gross
1981	61.3391609191895
1986	71.0056304931641
1989	75.0370635986328
1990	81.5170822143555
1991	76.1497421264648
1992	72.7790069580078
1993	61.7758102416992
1994	52.4101791381836
1995	38.8675994873047
1996	29.382640838623
1997	25.5618705749512
1998	14.7258901596069
1999	14.9797697067261
2000	20.6498508453369
2001	27.0887508392334
2002	27.4715099334717
2003	29.5020408630371
2004	30.4950408935547
2005	32.7273902893066
2006	33.9604988098145
2007	36.54296875
2008	37.8938407897949
2009	38.3259506225586
2010	34.4500007629395
2011	48.5211906433105
2012	53.9613800048828
2013	57.6641693115234
2014	57.5822486877441
2015	60.6941108703613
2016	59.7403106689453
2017	52.981014251709
2018	55.3844223022461
2019	62.482120513916
2020	74.1345901489258