Year	% of revenue
2003	0.7660961695191524
2004	0.8625515646245129
2005	0.6262842834380538
2006	0.5707452302005761
2007	0.7210232389666388
2008	0.5252042004386847
2009	0.29317261322575494
2010	0.11798164081241447
2011	0.254916953526042
2012	0.20326277101319964
2013	0.56442358528149
2014	0.3780105263878142
2015	1.636545832376188
2016	1.2454452483267577
2017	3.021735065539481
2018	1.5855342758346496
2019	1.6896706255075313
2020	2.0874192809092738
2021	2.671273822786233