Year	% gross
1970	4.15087985992432
1971	4.1736102104187
1972	4.23817014694214
1973	4.30117988586426
1974	4.32559013366699
1975	4.30887985229492
1976	4.29725980758667
1977	4.19782018661499
1978	4.27888011932373
1979	4.37134981155396
1980	4.38269996643066
1981	4.61193990707397
1982	4.47030019760132
1983	5.04111003875732
1984	5.33781003952026
1985	5.33450984954834
1986	5.48060989379883
1987	5.66126012802124
1988	5.03708982467651
1989	5.17999982833862
1990	5.34778022766113
1991	5.38811016082764
1992	5.24965000152588
1993	5.16563987731934
1994	5.07399988174438
1995	4.99159002304077
1996	5.57181978225708
1997	5.80475997924805
1998	6.56895017623901
1999	7.32621002197266
2000	8.06215953826904
2001	8.31624031066895
2002	8.66100025177002
2003	8.99713039398193
2004	9.26546001434326
2005	9.31206035614014
2006	10.0065202713013
2007	11.3548698425293
2008	12.8562002182007
2009	13.8845100402832
2010	15.4462099075317
2011	19.165599822998
2012	20.3866691589355
2013	20.1033992767334
2014	21.2364807128906
2015	22.2965507507324
2016	22.4284992218018
2017	22.9086208343506
2018	23.5082702636719
2019	24.5335807800293
2020	25.0290794372559
2021	26.3673000335693
2022	27.2942008972168