Year	% of revenue
1997	0.11351025631306033
1998	0.10855437709003699
1999	0.1973267653368796
2000	1.8506088790871609
2001	1.744213343349453
2002	1.385226724105916
2003	1.176242173216626
2004	1.2228047369398456
2005	1.2240992775774049
2006	1.096919352414972
2007	0.9194265694206036
2008	0.8619570138080611
2009	0.8017461331840456
2010	0.9193747429041548
2011	1.5679948342006305
2012	1.1790288093205292
2013	0.9800013755263298
2014	0.9416090806110772
2015	1.0390591880011826
2016	1.0527438090634027
2017	1.344995428501375
2018	1.3589822400372054
2019	1.3831803506928464
2020	1.8840964894248828
2021	1.3300652710507348