Year	% gross
1983	15.0223703384399
1984	14.919939994812
1985	14.8502397537231
1986	15.152099609375
1987	15.2370004653931
1988	15.4235095977783
1989	15.4405603408813
1990	15.4603796005249
1991	15.5904397964478
1992	15.644359588623
1993	15.6386203765869
1994	15.4523000717163
1995	15.5664596557617
1996	15.8969602584839
1997	15.3115701675415
1998	15.6879501342773
1999	13.4970903396606
2000	14.7608203887939
2001	15.2807302474976
2002	16.9059906005859
2003	18.135009765625
2004	19.3542709350586
2005	19.8586101531982
2006	21.1541996002197
2007	19.7361507415771
2008	19.7401504516602
2009	21.363000869751
2010	21.0689296722412
2011	22.7932796478271
2012	26.2223796844482
2013	28.6027507781982
2014	23.6200294494629
2015	25.5520095825195
2016	26.7100505828857
2017	27.265869140625
2018	27.246000289917
2019	27.5360698699951
2020	28.215389251709