Year	% gross
1970	1.64073002338409
1971	1.64482998847961
1972	1.70688998699188
1973	1.7679500579834
1974	1.8561600446701
1975	1.9221099615097
1976	2.00093007087708
1977	2.11213994026184
1978	2.26385998725891
1979	2.45591998100281
1980	2.58866000175476
1981	2.76868009567261
1982	2.92383003234863
1983	2.99760007858276
1984	3.1121199131012
1985	3.31539988517761
1986	3.49353003501892
1987	3.53968000411987
1988	3.76777005195618
1989	3.96334004402161
1990	4.04562997817993
1991	4.14148998260498
1992	4.23479986190796
1993	4.45386981964111
1994	4.57661008834839
1995	4.55631017684937
1996	4.57467985153198
1997	4.62951993942261
1998	4.64326000213623
1999	4.69610977172852
2000	5.1465802192688
2001	5.61611986160278
2002	6.01594018936157
2003	6.51779985427856
2004	6.7657299041748
2005	7.12264013290405
2006	7.29451990127563
2007	7.51076984405518
2008	7.95152997970581
2009	8.40880012512207
2010	8.98239040374756
2011	9.48095035552979
2012	9.75716018676758
2013	10.1296701431274
2014	10.3253402709961
2015	10.4029998779297
2016	10.3531103134155
2017	10.4503602981567
2018	10.4863700866699
2019	10.411190032959
2020	10.6927604675293
2021	10.4999799728394