Year	% of revenue
2010	35.657849311054264
2011	36.39135578025098
2012	34.281449961959495
2013	32.8955868554947
2014	31.478888374163965
2015	31.1579489306261
2016	37.00234673333946
2017	30.00431064964937
2018	33.46869142241128
2019	29.460001264296746
2020	30.65447858934779
2021	35.56517600299049
2022	32.38388366811317