Year	% of revenue
1992	2.0338983050847457
1993	2.0560747663551404
1994	0.6602661276739094
1995	0.7936203131686655
1996	2.094505423211996
1997	2.0323435180254155
1998	2.4889650890205757
1999	2.2242427974326673
2000	2.8750505767659877
2001	2.4922959264007916
2002	2.044129520919715
2003	1.7112631316445925
2004	1.486399231632485
2005	1.0282712370967317
2006	0.9068553911618008
2007	0.9252319483030041
2008	1.373273027951188
2009	2.0693683651063832
2010	1.7548158729066277
2011	2.971583120127483
2012	3.7785645114635344
2013	2.823620714715837
2014	3.115983795641126
2015	4.80807704411736
2016	5.6944486392959135
2017	5.383935298774767
2018	5.172587441190162
2019	4.9585865310386605
2020	5.182801675162574
2021	4.778402422568552
2022	3.2648154054539935