Year	% of total merchandise exports
1981	0.30279173984133717
1989	0.04506638216114994
1990	0.1627715956979373
1991	0.01769334401674296
1992	0.17699765605340467
1993	0.025770210417672638
1994	0.007223283949740635
1996	0.002393606581077678
1997	0.1405682852538612
1998	0.022008631428038935
1999	0.04146082827121712
2000	0.27405646699964914
2001	0.2688008068094231
2002	0.2067723750095695
2003	0.2572680152131281
2004	1.5593285136114294
2005	3.370537618048079
2006	6.6043985077060015
2007	3.2038932016856663
2008	5.977842618115255
2009	6.186650999987213
2010	9.646903369373517
2011	7.9596021484580355
2012	11.436351092543482
2013	13.398857735725253
2014	14.064014358074846
2015	10.641921230807002
2016	9.986740697790696
2017	9.483034484798512
2018	8.486127709816806
2019	8.385195902010539
2020	5.8385532699866785