Year	% of total merchandise exports
1970	0.05820721769499418
1982	4.956629491945478
1983	0.07574896792134404
1984	0.39936102238807686
1985	0.0549141701180466
1986	0.01931680014590056
1987	0.03127758646590058
1990	0.009523400432178909
1998	0.056588773576621794
1999	0.31756955723692964
2000	0.052613141226565664
2001	0.1803787307332178
2002	0.11992458741235645
2003	0.04541640924175647
2004	0.10883683674959863
2005	0.05310680568734476
2006	0.03386670199398746
2007	0.04768852668803878
2008	0.01043199430802592
2009	0.0077081581059504035
2010	0.010675149563882805
2011	0.014757137514943749
2012	0.028345283316571324
2013	0.009860087974916271
2014	0.006862301587217616
2015	0.010486531449608543
2016	0.014851617007054172
2017	0.004832366522815928
2018	0.023022988095482026
2019	0.009809874780032514
2020	0.007957328333189144