Year	% of revenue
2005	0.004583037984491699
2006	0.005947588034670603
2007	0.0057957769633975986
2008	1.8986872357783877
2009	2.1047413725274207
2010	2.379575505610953
2011	2.480392156862745
2012	2.466686207751798
2013	1.3991347453775447
2014	0.4623794900307227
2015	0.4240589897917575
2016	0.39829638294042674
2017	0.38084142203049914
2018	0.3946210737815655
2019	0.3656048743141345
2020	0.27590515727377385
2021	0.25921588238374793