Year	% of revenue
1990	0.5417118093174431
1991	3.1258725283651043
1992	3.625513760033837
1993	4.753811789841701
1994	4.362595453203981
1995	5.422043868849469
1996	6.207081365356915
1997	5.4877433672954705
1998	5.567673683062494
1999	4.784561134445239
2000	3.5201889785662175
2001	2.6445614403385393
2002	2.101151212660831
2003	2.3002564740080196
2004	2.3077559891668717
2005	2.4542787647154913
2006	2.419044897996802
2007	0.04583438699740224
2008	0.03341226024893943
2009	0.03198381763313182
2010	0.015933715742511154
2011	0.0055250381056751825
2012	0.051660187662881295
2013	0.008132884166246383
2014	0.0004241917497532618
2015	0.001110846217013208
2016	0.0019406590566368113
2017	0.018929978897927368
2018	0.020013929133866546
2019	0.021640706769686963
2020	0.016048458241755846
2021	0.02845536241998838
2022	0.03729324787305543