Year	% gross
1970	1.43427002429962
1971	1.44493997097015
1972	1.51318001747131
1973	1.56192994117737
1974	1.6282399892807
1975	1.71884000301361
1976	1.79455995559692
1977	1.84939002990723
1978	1.97046005725861
1979	2.0244300365448
1980	2.1015899181366
1981	2.14488005638123
1982	2.1730899810791
1983	2.18952989578247
1984	2.20936989784241
1985	2.24739003181458
1986	2.30627989768982
1987	2.292799949646
1988	2.33528995513916
1989	2.35072994232178
1990	2.37260007858276
1991	2.4157600402832
1992	2.44595003128052
1993	2.49777007102966
1994	2.53375005722046
1995	2.56648993492126
1996	2.62329006195068
1997	2.72231006622314
1998	2.80471992492676
1999	2.90211009979248
2000	3.17933988571167
2001	3.4682400226593
2002	3.7639799118042
2003	3.99037003517151
2004	4.31609010696411
2005	4.64176988601685
2006	5.01468992233276
2007	5.34268999099731
2008	5.8783597946167
2009	6.46070003509521
2010	7.08478021621704
2011	7.35044002532959
2012	7.75427007675171
2013	8.15386009216309
2014	8.39931011199951
2015	8.47813987731934
2016	8.36727046966553
2017	8.5011100769043
2018	8.63434028625488
2019	8.6761999130249
2020	9.11913013458252
2021	8.96238040924072