Year	% of revenue
2011	0.1433756603722063
2012	0.11348131552264443
2013	0.10007079857489165
2014	0.12352269319885466
2015	0.13074543552515855
2016	0.110555525473012
2017	0.19456445416646342
2018	0.284610191769451
2019	0.9709319121332639
2020	1.3374712924055425