Year	% of total merchandise exports
1964	1.3850415512465373
1967	0.7736943907156674
1971	0.05272285813388831
1972	0.0873835398948936
1973	0.07448489667736968
1974	0.0041944901177812825
1975	0.05115725007856292
1976	0.02768749247622487
1977	0.4137924296015477
1978	0.6261896223552453
1979	1.6022239504337474
1980	0.8729092906848981
1981	1.190377509342504
1982	1.4109774753281832
1983	1.0416121397832605
1984	1.2101310231487759
1985	0.24133777617569743
1986	0.7863925758066257
1987	1.4589668723232134
1988	1.0867744421595449
1989	1.0148329829527074
1990	1.2464597412557235
1991	1.3120095917892978
1992	0.4772787794761312
1993	0.5626295150401647
1994	0.6654953892631105
1995	1.6245873215685342
1996	1.0010158930990736
1997	0.637183355151538
1998	0.9690187028282076
1999	0.5436550941099487
2000	1.8937500419143007
2001	0.6606991329336853
2002	0.6416651328207265
2003	0.8883290163461001
2004	1.6154915314946257
2005	0.7472271961881553
2006	1.0736800782101583
2007	1.7405085139303536
2008	0.6854488853680141
2009	2.973412380382125
2010	1.7155632095176823
2011	2.216893550103661
2012	3.7823269496906833
2013	1.4918512961661763
2014	0.5035636337018272
2015	4.915803407899972
2016	2.9062383003894023
2017	1.6745167691064293
2018	2.224239024095375
2019	1.7795867668435446
2020	0.406472312023112