Year	% of revenue
2010	34.806461086654494
2011	34.82052314824321
2012	39.115326972492845
2013	33.00806697530009
2014	34.333143298029434
2015	28.899085925892493
2016	17.01451095498391
2017	23.872198725992906
2018	24.39194825568186
2019	24.796621472933584
2020	18.688136358855907
2021	32.19289699622549
2022	30.247670268389154