Year	% of revenue
2003	1.1899077844871975
2006	1.913910450243276
2009	1.9247784812223272
2010	0.6410470728240388
2011	0.6114198801246405
2012	0.6615719680382459
2013	0.879325243604342
2014	0.8312480349566143
2015	1.2241484397518092
2016	1.1942648655533594
2017	1.4072943700716734
2018	1.2246667765103036
2019	0.9983350226023877
2020	1.5559523818566154
2021	1.2778692954351925