Year	% gross
1970	5.66509008407593
1971	6.17686986923218
1972	6.6774001121521
1973	8.40528011322021
1974	9.68517017364502
1975	11.8623104095459
1976	12.8799800872803
1977	12.9189796447754
1978	12.9346704483032
1979	13.3365802764893
1980	14.4206600189209
1981	15.5799903869629
1982	17.1794605255127
1983	18.5601501464844
1985	20.3516407012939
1986	22.1563701629639
1987	24.7479095458984
1988	27.3640995025635
1989	30.2572898864746
1990	27.9315795898438
1991	28.3301696777344
1992	28.9591503143311
1993	31.5279903411865
1994	31.8302402496338
1995	33.583911895752
1996	35.5959281921387
1997	36.7699317932129
1998	55.7154312133789
1999	55.006420135498
2000	57.9204788208008
2001	61.3642387390137
2002	59.3999710083008
2003	59.0015411376953
2004	62.0919189453125
2005	64.0145797729492
2006	65.0915374755859
2007	69.3286285400391
2008	73.3755111694336
2009	77.6691818237305
2010	78.8646621704102
2011	76.6178512573242
2012	76.459228515625
2013	83.4641494750977
2014	86.9034423828125
2015	89.1690063476563
2016	93.6979522705078
2017	98.243278503418
2018	103.51692199707
2019	105.819526672363
2020	102.908027648926
2021	96.441780090332