Year	% gross
1971	0.0274000000208616
1972	0.028659999370575
1974	0.0429700016975403
1979	0.118409998714924
1980	0.170129999518394
1982	0.126530006527901
1983	0.122050002217293
1984	0.102880001068115
1986	0.265489995479584
1987	0.262639999389648
1988	0.254379987716675
1989	0.274040013551712
1990	0.284960001707077
1991	0.276639997959137
1994	0.261519998311996
1995	0.266009986400604
1996	0.263330012559891
1997	0.325650006532669
1998	0.321900010108948
1999	0.349409997463226
2000	0.508210003376007
2001	0.630289971828461
2002	0.885200023651123
2003	1.20044004917145
2004	1.35943996906281
2005	1.41463994979858
2008	1.65834999084473
2009	3.09548997879028
2010	4.17203998565674
2011	4.41616010665894
2012	4.86634016036987
2013	5.21799993515015
2014	5.05316019058228
2015	6.61399984359741
2016	7.06099987030029
2017	7.53299999237061
2018	7.74200010299683