Year	% gross
1970	1.61628997325897
1971	1.63242995738983
1972	1.68199002742767
1973	1.69553995132446
1974	1.75143003463745
1975	1.71614003181458
1976	1.66461002826691
1977	1.8194500207901
1978	1.84774994850159
1979	2.12538003921509
1980	2.21707010269165
1981	2.27033996582031
1982	2.41653990745544
1983	2.6191999912262
1984	2.75734996795654
1985	2.81533002853394
1986	2.8475399017334
1987	2.86115002632141
1988	2.67000007629395
1989	2.66827011108398
1990	2.75353002548218
1991	2.8017098903656
1992	2.7866199016571
1993	2.90457010269165
1994	2.88700008392334
1995	2.91770005226135
1996	3.00718998908997
1997	3.07154011726379
1998	3.20186996459961
1999	3.42782998085022
2000	3.6829400062561
2001	4.15748977661133
2002	4.25153017044067
2003	4.41052007675171
2004	4.48194980621338
2005	4.83444976806641
2006	5.26733016967773
2007	5.6765398979187
2008	6.2876501083374
2009	7.16010999679565
2010	7.95007991790771
2011	8.49796009063721
2012	8.75722980499268
2013	9.01393985748291
2014	9.10906028747559
2015	9.4325704574585
2016	9.70256042480469
2017	9.76651000976562
2018	10.2354898452759
2019	10.744330406189
2020	10.7770004272461
2021	10.690299987793