Year	% of revenue
2002	0.9263881669351477
2003	0.8019727853749942
2004	0.6654287202104674
2005	0.5907310704960835
2006	0.49236233024597936
2007	0.46078307944101726
2008	0.4474084079014013
2009	0.45341944616473506
2010	0.4439487850387115
2011	0.3823491383291158
2012	0.48077874285262057
2013	0.3837605056609016
2014	0.2889537123672189
2015	0.2736783249709401
2016	0.2150050922258685
2017	0.15622474815493184
2018	0.13438540253976083
2019	0.1160646351056833
2020	0.10385693351733558
2022	0.0549697105676464