Year	% of total merchandise exports
1967	0.0294811320754717
1968	0.07100591715976332
1973	0.011618315111942466
1974	0.012366136571612297
1975	0.005068680622433981
1989	0.2363282013671416
1990	0.1593157258963895
1991	0.3350521697052524
1992	0.3655801633443751
1993	0.3354644690097841
1994	0.38470907977362606
1995	0.7290375341935676
1996	0.5647893058665618
1997	0.773283550822636
1998	0.6973479812876264
1999	1.548718826178698
2000	2.775551626938495
2001	2.1753937215457815
2002	2.0362639730188983
2003	1.6455483215014097
2004	1.9880987600564382
2005	1.9618031352056549
2006	1.462797241070949
2007	2.524037066797377
2008	2.00140440623241
2009	1.3863450034282248
2010	2.943406825758788
2011	2.6060836178304148
2012	3.398849543917658
2013	2.056716846222231
2014	4.653508093922203
2015	4.721839879574413
2016	4.244448086674055
2017	3.4228015703337347
2018	5.309332339372596
2019	4.867071934273411
2020	4.592963200632242