Year	% of revenue
1994	8.11035996556368
1995	8.852382351140962
1996	9.148829796742906
1997	10.109271233006702
1998	9.706441925187503
1999	8.07984254726699
2000	7.925765041522509
2001	6.810061304620978
2002	6.47816726225619
2003	5.994148128687647
2004	4.916485443053649
2005	4.190168996582765
2006	3.9833053088398103
2007	3.2891500217871052
2008	3.1947906598158418
2009	3.9974315232600484
2010	4.286382549178915
2011	4.455168265214049
2012	4.926251847802637
2013	4.929022136738183
2014	4.761305204777627
2015	4.480334929703263
2016	4.567914466334196
2017	4.138206670579482
2018	3.7849660544161763
2019	3.6999237729599135
2020	3.6506184542926055
2021	3.2716476701148016
2022	3.2875394196408205