Year	% of revenue
2001	0.28083313831032064
2002	0.05279359406739263
2003	0.26480783103911415
2004	0.21106444397317434
2005	0.18107493075222006
2006	0.17092944847810065
2007	0.15335793133816183
2009	3.291179685820797
2010	3.8194958081418844
2011	3.7971642529235448
2012	3.8496011733045545
2013	3.314435191679895
2014	3.2920209433934025
2015	2.8531492452860796
2016	2.3219748453575066
2017	2.199702319972556
2018	2.02481256988028
2019	2.0410955797232995
2020	2.0860685211838805
2021	1.9898923318451005
2022	1.895533234899659