Year	% gross
1977	20.3888301849365
1978	24.3174095153809
1979	25.5589199066162
1980	34.0187911987305
1981	34.0331611633301
1982	32.3625183105469
1983	30.9521903991699
1985	33.690071105957
1986	34.6565284729004
1987	33.3400192260742
1988	36.2782783508301
1989	34.6293182373047
1990	31.6512794494629
1991	28.7668590545654
1992	27.671199798584
1993	27.8269901275635
1994	30.0542106628418
1995	33.2540397644043
1996	34.9493408203125
1997	37.9361000061035
1998	39.516918182373
1999	40.3548011779785
2000	40.7890281677246
2001	42.283088684082
2002	45.2981414794922
2003	49.5644912719727
2004	54.3299789428711
2005	59.8049697875977
2006	65.6577224731445
2007	68.0223693847656
2008	68.2560272216797
2009	69.36865234375
2010	71.2736968994141
2011	74.550407409668
2012	78.8856887817383
2013	82.4204864501953
2014	82.0448684692383
2015	83.973258972168
2016	87.8091506958008
2017	96.531982421875
2018	100.234931945801
2019	95.888786315918
2020	92.7634811401367
2021	92.4453887939453