Year	% of total merchandise exports
1981	0.5597223777073461
1987	0.0014416571015119423
2000	0.9430998269226476
2001	1.358102893819321
2002	1.505698266368343
2003	2.6707283677596596
2004	1.476250152894762
2005	3.2491671145196106
2006	3.5219613687018594
2007	4.314719464377151
2008	20.77387716828014
2009	36.951911418045896
2010	14.242385870865487
2011	14.439547906104305
2012	23.24680893999179
2013	20.474742759840968
2014	24.896871665567932
2015	24.94749902664608
2016	25.196938483136666
2017	39.359595324422
2018	23.41232987540595
2019	36.053725108813936
2020	12.924831698729367