Year	% of revenue
2010	1.87063532805955
2011	2.092015425254182
2012	2.178378133852428
2013	2.4200737732972053
2014	2.324025114377189
2015	2.2212202925183586
2016	1.690043356087562
2017	1.7642876190750938
2018	2.032255896066109
2019	1.9921252335729105
2020	2.337194645108944
2021	2.5183593903796595
2022	1.976934813900285