Year	% gross
1981	18.2896595001221
1982	17.5345706939697
1983	17.6124897003174
1984	18.4335899353027
1985	18.4478797912598
1986	19.5082206726074
1987	20.3156299591064
1988	20.37619972229
1989	20.5971908569336
1990	23.1192207336426
1991	23.0595397949219
1992	26.6892890930176
1993	27.3418598175049
1994	29.0984802246094
1995	29.539249420166
1996	32.3372802734375
1997	35.7757797241211
1998	45.1497497558594
1999	51.9868087768555
2000	55.3705101013184
2001	60.8455085754395
2002	66.6545715332031
2003	69.6047668457031
2004	73.348876953125
2005	81.2728118896484
2006	85.2738876342773
2007	87.2651672363281
2008	88.5987091064453
2009	87.96533203125
2010	90.2514877319336
2011	87.1887130737305
2012	89.0215606689453
2013	87.8572082519531
2014	84.3780288696289
2015	82.1997833251953
2016	79.4747467041016
2017	79.2703475952148
2018	77.3015975952148
2019	76.4720077514648
2020	75.8166809082031
2021	82.2400436401367
2022	82.3922576904297