Year	% gross
1971	16.8564300537109
1973	23.8165702819824
1974	29.2026290893555
1975	32.5360794067383
1985	27.3917102813721
1986	28.4566307067871
1987	29.1229000091553
1988	30.7925090789795
1989	32.1112785339355
1990	33.5497703552246
1991	33.5809097290039
1992	34.7383003234863
1993	35.5810699462891
1994	36.9043006896973
1995	38.4386215209961
1996	41.6063385009766
1997	44.9611892700195
1998	45.8212394714355
1999	47.3160705566406
2000	48.4724807739258
2001	53.4674301147461
2002	55.7074089050293
2003	56.9704284667969
2004	59.6585311889648
2005	59.9716415405273
2006	61.7601203918457
2007	63.4607009887695
2008	64.7292098999023
2009	66.0619430541992
2010	67.8275985717773
2011	69.0896682739258
2012	69.9521865844727
2013	80.5621337890625
2014	79.7845687866211
2015	79.6362075805664
2016	83.4306869506836
2017	83.5817413330078
2018	85.2500076293945
2019	87.2906112670898
2020	88.3590774536133