Year	% gross
1970	8.54889965057373
1971	8.65540027618408
1972	9.50749015808105
1973	10.6190700531006
1974	11.9223499298096
1975	13.36439037323
1976	13.8548402786255
1977	14.0227899551392
1978	14.3154897689819
1979	14.8510799407959
1980	15.3141298294067
1981	15.6419696807861
1982	15.7358798980713
1983	16.096399307251
1984	16.5256805419922
1985	16.9818000793457
1986	17.5099697113037
1987	17.3724098205566
1988	17.8126697540283
1989	17.5862598419189
1990	17.2787494659424
1991	17.4775295257568
1992	17.1800708770752
1993	16.8317203521729
1994	16.8092308044434
1995	16.9747905731201
1996	17.2951393127441
1997	17.9462890625
1998	19.2453193664551
1999	20.2531890869141
2000	21.2034091949463
2001	22.5179100036621
2002	24.0012493133545
2003	25.2672901153564
2004	26.4721202850342
2005	27.9301109313965
2006	30.405029296875
2007	31.3630104064941
2008	33.9401588439941
2009	34.5290489196777
2010	35.973388671875
2011	37.3229904174805
2012	38.7170104980469
2013	39.5625801086426
2014	40.9349594116211
2015	42.1253395080566
2016	43.8001708984375
2017	44.8646011352539
2018	45.3352508544922
2019	45.9143714904785
2020	46.5854988098145
2021	47.4163398742676
2022	47.4950294494629