Year	% of total merchandise exports
1989	6.474517753198714
1990	0.13892434342827484
1991	0.41060820192896813
1992	6.903982925320555
1993	0.07884209353827026
1994	0.047217012694327154
1995	0.133110218570795
1996	0.40733164358696283
1999	2.8194934671123857
2004	71.83170079863478
2008	1.9232006534686148
2009	4.923388686548099
2010	4.090272735819244
2011	1.8261391203956974
2012	3.9362372334994142
2013	0.7179351342358572
2014	6.299276997114228
2015	0.01574742678901047
2016	8.674925853636653
2017	6.31674296305817
2018	1.4637619784675537
2019	0.17173923983374936