Year	% of total exports
2005	6.781576716586607
2006	7.72447027141946
2007	4.527412552716448
2008	4.09330768851408
2009	4.14569144210838
2010	2.9671066041667142
2011	2.423046339922231
2012	2.7508602464055203
2013	3.5536531422306505
2014	4.380107407241797
2015	5.371266380259588
2016	4.606773371650674
2017	2.8459875052152164
2018	3.264995638937714
2019	2.7987317885782357
2020	0.7766532532675843