Year	% of total exports
2003	3.454028743555443
2007	2.7675831314796135
2008	2.0984740412176053
2009	3.337679524818797
2010	2.8781905163630386
2011	2.4764488096825596
2012	2.103052292284086
2013	2.2411595059650087
2014	2.609493041344793
2015	5.129571924424298
2016	6.689653977209768
2017	6.26113901615019
2018	5.389998799849856
2019	6.94361064014203
2020	3.2595382425414243