Year	% gross
1971	14.1394100189209
1972	15.6152296066284
1973	16.8236999511719
1974	17.1437301635742
1975	17.6551990509033
1976	18.3561592102051
1977	18.079740524292
1978	17.9733390808105
1981	19.7278900146484
1983	22.1313705444336
1984	22.0071792602539
1986	18.7366409301758
1989	19.7379093170166
1990	21.8773097991943
1991	21.2680492401123
1992	24.5504398345947
1993	22.971170425415
1994	27.915060043335
1995	29.5531692504883
1996	28.9825096130371
1997	30.5842895507812
1998	30.8585605621338
1999	30.8745498657227
2000	34.6345596313477
2001	34.7377090454102
2002	38.3998603820801
2003	42.9507598876953
2004	46.4737281799316
2005	48.0111808776855
2006	51.1685218811035
2007	51.5493011474609
2008	51.0750389099121
2009	50.6324882507324
2010	56.664379119873
2011	59.1097793579102
2012	58.2737312316895
2013	57.5093612670898
2014	59.0213088989258
2015	54.5602684020996
2016	52.6891784667969
2017	50.1191482543945
2018	48.7285308837891
2019	47.976188659668
2020	50.5546798706055
2021	57.6537284851074