Year	% of revenue
2008	1.058968055068247
2009	1.2111290785772209
2010	1.1642769262734036
2011	1.1019592698602962
2012	1.0098509941839537
2013	0.9132604752136738
2014	0.6491822047594035
2015	0.8430075334471469
2016	1.0663304961043392
2017	0.9893818688237083
2018	0.8983426911587001
2019	0.8539902303488238
2020	0.8628565857605704
2021	0.805041025131013