Year	% of revenue
2008	1.410062259650848
2009	2.1614883139955507
2010	2.4803851083117125
2011	2.971583120127483
2012	3.4543203349981217
2013	3.0424904024444386
2014	3.023897179628732
2015	4.325927399641893
2016	4.990652984562533
2017	4.736515601517701
2018	4.761195014507715
2019	4.66280679918396
2020	4.867363520270771
2021	4.981860953831351
2022	3.762697555174335