Year	% of total merchandise exports
1981	0.3837627013743812
1982	0.5178161381262324
1983	0.7677235349600243
1984	0.2420623480860556
1985	0.1886987545856022
1986	0.575610099673336
1987	4.293803605637509
1988	7.0277812071077195
1989	5.205344265846793
1990	3.571237516682393
1991	1.3882158522029848
1992	1.3523649921974994
1993	2.4652734664486835
1994	3.1271454598318855
1995	8.801239174447185
1996	3.8021111742049816
1997	10.39784551243175
1998	16.313664489657548
1999	19.574781479029358
2000	36.117933262489785
2001	29.80746543922599
2002	14.987161153536727
2003	14.704511867375485
2004	13.268527807872516
2005	15.01388705360264
2006	12.903887911199702
2007	9.668045355558558
2008	17.2989310403537
2009	17.429672491420128
2010	15.528625997258946
2011	7.869406719612288
2012	4.450635742494819
2013	4.2827394511665124
2014	3.269368981972217
2015	2.7746393016296085
2016	1.6302507553050904
2017	1.904649852147177
2018	3.6871742675691146
2019	9.922345911711615
2020	14.177429411546594