Year	% of total merchandise exports
1981	18.931211487898505
1982	4.200949386785199
1983	2.6829126136721526
1984	1.2532921739503717
1985	2.669446719960193
1986	0.47261863179823327
1987	0.39082416239567047
1988	0.8885768136373676
1989	6.335494184309501
1990	10.247648097322163
1991	1.2546158016791784
1992	3.686795637167603
1993	5.7067949237225735
1994	5.201215829383925
1995	7.649829873601741
1996	4.321015509475954
1997	12.744771409460107
1998	9.565063519172355
1999	11.291080612544988
2000	7.025717277049876
2001	4.391468696438158
2002	8.179615675481037
2003	3.7420899136393593
2004	3.8880845958436367
2005	7.010863169541502
2006	4.497245235671955
2007	2.392691344487381
2008	9.025907417240036
2009	6.659670115320349
2010	4.7283228106129
2011	8.090162561983053
2012	1.7288505263678298
2013	1.1915318063290774
2014	0.8274981433709123
2015	1.0182455770833658
2016	0.5875785223251795
2017	0.8192607109639165
2018	3.2596084301535893
2019	2.0657524043581734
2020	2.6228737612905486