Year	% of total exports
2005	8.434050958505125
2006	8.23009726266009
2007	8.226009231951602
2008	8.30093341175064
2009	9.363854083153836
2010	5.552801339576147
2011	4.116018416037701
2012	3.8919152288173957
2013	6.3294190609893635
2014	5.696966477867056
2015	5.517391197963387
2016	5.256085540210831
2017	4.609819685009589
2018	3.967777796102059
2019	3.8722645969354943