Year	% of total exports
2005	4.167283612087796
2006	4.349106571156581
2007	4.441242587078335
2008	4.55528737359206
2009	4.183464980862982
2010	3.9381348431159444
2011	4.112745957346153
2012	3.9367224101774707
2013	4.109497436821405
2014	3.90417142696939
2015	3.227862031625164
2016	3.48357482022111
2017	3.5103749601822365
2018	3.2392117939665837
2019	2.9479627744911348
2020	0.7284812652788952