Year	% of revenue
2012	0.5263183579997368
2013	0.6050571792324159
2014	0.6486673180913087
2015	1.1866432789825763
2016	1.8274641552549455
2017	1.7527961194761774
2018	1.674946706005937
2019	1.2383780356542236
2020	1.6614333204314848
2021	1.590621309628112