Year	% of revenue
1990	0.9190251931781811
1991	2.9672578444747613
1992	5.884074533468984
1993	5.530818139880057
1994	3.983622397688787
1995	0.009853638279977055
1996	0.009096439312536599
1997	0.007206026119304699
1998	0.2797482302285639
1999	0.8587509872894734
2000	0.7300671789042572
2001	0.6871657653032053
2002	0.7868443098520044
2003	0.6695861009974531
2004	0.6703879903231582
2005	0.5219017368281677
2006	0.41794897798845837
2007	0.13757362274340162
2008	0.0778082284884996
2009	0.08461529085882964
2010	0.07937048379039069
2011	0.10561177431502701
2012	0.07265082231637154
2013	0.07453609891106226
2014	0.10521792428662119
2015	0.04408580561651635
2016	0.11712988445039291
2017	0.10855530284684316
2018	0.09517935277674479
2019	0.03986847347452053
2020	0.07254693003557003
2021	0.06894641739265188
2022	0.05902623585683931