Year	% gross
1970	1.37565004825592
1971	1.37884998321533
1972	1.41391003131866
1973	1.45274996757507
1974	1.51197004318237
1975	1.55625998973846
1976	1.61061000823975
1977	1.68596994876862
1978	1.78498995304108
1979	1.91103005409241
1980	2.00278997421265
1981	2.12846994400024
1982	2.23810005187988
1983	2.29024004936218
1984	2.37392997741699
1985	2.51721000671387
1986	2.65480995178223
1987	2.71882009506226
1988	2.86226010322571
1989	3.00564002990723
1990	3.06578993797302
1991	3.17858004570007
1992	3.29209995269775
1993	3.49524998664856
1994	3.67199993133545
1995	3.6805100440979
1996	3.72890996932983
1997	3.80497002601624
1998	3.86658000946045
1999	3.9663999080658
2000	4.35818004608154
2001	4.74609994888306
2002	5.1048698425293
2003	5.4866099357605
2004	5.73102998733521
2005	6.04238986968994
2006	6.22964000701904
2007	6.41587018966675
2008	6.76585006713867
2009	7.1854100227356
2010	7.65902996063232
2011	8.01251983642578
2012	8.35214996337891
2013	8.7182502746582
2014	8.88115978240967
2015	8.99930953979492
2016	9.01636028289795
2017	9.1466703414917
2018	9.24575042724609
2019	9.23931980133057
2020	9.56161022186279
2021	9.39892959594727