Year	% of revenue
1991	0.3021978021978017
1992	0.28833381928920815
1993	0.6760541834836267
1994	0.5502288080191756
1995	0.9634734302976442
1996	1.0252149581057037
1997	0.8445764339368904
1998	0.8788786172601658
1999	0.991707431836341
2000	0.8904568623016536
2001	0.9136719338686629
2002	0.871547597401227
2003	0.8647451416992123
2004	1.0108901907888945
2005	0.987066858689827
2006	1.3418762867184517
2007	1.5111221759594249
2008	1.4745311455413377
2009	1.5817297296342026
2010	1.430099116120196
2011	1.288297775011167
2012	1.0866549939040053
2013	1.0379502643655647
2014	1.2336929179692784
2015	1.3957045855937469
2016	1.379999566668111
2017	1.3118578890654489
2018	1.205135310336699
2019	1.091803533112326
2020	0.9856808115911377
2021	0.9177773096936941
2022	0.8445931074529458