Year	% gross
1983	22.3086109161377
1984	22.7886009216309
1985	23.255350112915
1986	23.8602600097656
1987	24.3416690826416
1988	24.9219608306885
1989	24.6378993988037
1990	24.4579391479492
1991	24.2796192169189
1992	23.8943004608154
1993	23.3252105712891
1994	22.7400608062744
1995	22.3184204101563
1996	22.1015605926514
1997	21.1326007843018
1998	20.8400402069092
1999	20.2132205963135
2000	20.48703956604
2001	19.6423492431641
2002	17.9872398376465
2003	17.9154605865479
2004	18.9997406005859
2005	19.8457908630371
2006	22.4768695831299
2007	23.8867301940918
2008	24.7959804534912
2009	25.6359195709229
2010	26.336519241333
2011	29.1484203338623
2012	31.5238800048828
2013	33.578971862793
2014	29.4020309448242
2015	30.9973697662354
2016	32.0077590942383
2017	33.9179611206055
2018	34.6181983947754
2019	35.1181907653809
2020	36.1958389282227