Year	% of revenue
2010	24.157970360165017
2011	26.005978873751644
2012	23.16762871111406
2013	24.00012052842793
2014	26.926253696335152
2015	39.91163560523836
2016	32.616602816608356
2017	31.28442508165017
2018	29.863016530858495
2019	23.742775956623156
2020	21.661087038594236
2021	23.93576812222905
2022	25.853722937051867