Year	% gross
1971	9.05696964263916
1972	9.31595039367676
1973	10.5644598007202
1974	11.2998695373535
1975	12.773229598999
1976	13.8395204544067
1977	14.6101903915405
1978	13.778510093689
1979	14.651780128479
1980	14.3251600265503
1981	15.470419883728
1982	16.2660808563232
1983	18.2519397735596
1984	20.4658393859863
1985	23.0199508666992
1986	24.5102806091309
1987	26.2112007141113
1988	24.5416603088379
1989	23.8364295959473
1990	24.8621597290039
1992	34.3386383056641
1993	38.2253303527832
1994	38.0567092895508
1995	37.9078788757324
1996	41.0571899414062
1997	44.7144889831543
1998	48.0398483276367
1999	49.6868286132812
2000	54.0374412536621
2001	62.9137496948242
2002	70.8614501953125
2003	76.7724533081055
2004	86.3683776855469
2005	96.1587677001953
2006	100.395729064941
2007	94.5221633911133
2010	108.33528137207
2011	112.845481872559
2012	116.461570739746
2013	117.245422363281
2014	120.519813537598
2016	128.568283081055
2017	134.1123046875
2018	140.89501953125
2019	147.178802490234
2020	148.757995605469
2021	156.148895263672