Year	% of total exports
2001	4.324947212490989
2002	4.5039798097456805
2003	3.9861559224994734
2004	3.615996327239203
2005	2.902895486687444
2006	2.9171674795970093
2007	3.1829663094312526
2008	3.022539902121366
2009	3.606636210627555
2010	2.996379764869628
2011	2.9577215837609456
2012	3.0309916351345305
2013	3.412066396602462
2014	3.4576445826854436
2015	3.354918269219393
2016	3.857950746949151
2017	3.639129248798506
2018	3.6839245076858154
2019	3.5780547717870577
2020	1.3004275447173022