Year	% gross
1970	0.973909974098206
1971	0.97325998544693
1972	0.983319997787476
1973	0.985719978809357
1974	0.979569971561432
1975	0.983699977397919
1976	0.985000014305115
1977	1.10076999664307
1978	1.14335000514984
1979	1.25044000148773
1980	1.31760001182556
1981	1.36988997459412
1982	1.53387999534607
1983	1.57052004337311
1984	1.62371003627777
1985	1.68272995948792
1986	1.67738997936249
1987	1.7824000120163
1988	1.61646997928619
1989	1.61234998703003
1990	1.64104998111725
1991	1.66981995105743
1992	1.67966997623444
1993	1.84219002723694
1994	1.86618995666504
1995	1.93368005752563
1996	2.04864001274109
1997	2.15030002593994
1998	2.28677010536194
1999	2.53383994102478
2000	2.7853000164032
2001	3.18142008781433
2002	3.20615005493164
2003	3.28096008300781
2004	3.33770990371704
2005	3.65720009803772
2006	4.00936985015869
2007	4.27593994140625
2008	4.73988008499146
2009	5.46226978302002
2010	6.15385007858276
2011	6.65558004379272
2012	6.99783992767334
2013	7.3004298210144
2014	7.40278005599976
2015	7.69357013702393
2016	7.94901990890503
2017	8.06149959564209
2018	8.52820014953613
2019	9.015700340271
2020	9.2065896987915
2021	9.22922039031982