Year	% of total exports
2001	3.756909706091537
2002	2.7323861517678685
2003	2.5512787002498647
2004	3.224615104830734
2005	2.785445684970193
2006	2.6757533815556145
2007	2.7395846632796688
2008	2.0925295914791016
2009	3.1409238181178285
2012	0.6883816726292262
2013	0.7787110255550681
2014	0.6770528701501091
2015	2.1703204800291287
2016	2.6955987293618215
2017	2.9373964691165564
2018	2.6985038850586527