Year	% gross
1971	1.2569500207901
1972	1.24026000499725
1973	1.54632997512817
1974	1.69959998130798
1975	2.19379997253418
1976	2.81416988372803
1977	2.70286989212036
1978	3.88964009284973
1979	3.45953989028931
1981	5.83705997467041
1982	6.32048988342285
1983	5.56757020950317
1984	6.32838010787964
1986	8.23141002655029
1987	8.62903022766113
1988	9.3776798248291
1989	10.0107402801514
1990	10.744119644165
1991	10.6015796661377
1992	10.3104600906372
1993	10.6662998199463
1994	10.7895603179932
1995	11.2576904296875
1997	11.4713802337646
1998	9.00465965270996
1999	9.4428596496582
2000	10.0391302108765
2001	10.3949604034424
2002	10.5032501220703
2003	10.933159828186
2004	11.0605201721191
2005	11.6413602828979
2006	12.1367998123169
2007	11.6063098907471
2008	12.6738996505737
2009	13.1693201065063
2010	14.0829296112061
2011	15.9613800048828
2012	19.1758098602295
2013	22.5497703552246
2014	25.4523506164551
2015	28.6955890655518
2016	32.2695808410645
2017	33.7370109558105
2018	35.6224212646484
2019	38.0248603820801
2020	40.02001953125
2021	42.8228912353516
2022	46.1795501708984