Year	% of revenue
2005	2.0025780787714753
2006	2.194238781476597
2007	3.3038872999472906
2008	2.659941834233682
2009	5.271133315973811
2010	6.396708028301402
2011	6.616589472550198
2012	6.717725195494206
2013	6.861768204835617
2014	6.486013561393078
2015	6.798757993096853
2016	7.47328100967763
2017	8.226837146612247
2018	8.438846330931286
2019	8.23351424685673
2020	8.123374211368123
2021	8.062788045550542
2022	9.29955429058833