Year	% of total merchandise exports
1960	1.276207839562443
1961	1.4475271411338964
1962	1.205699671172817
1963	1.1635782118488063
1964	1.1632971629075937
1965	1.6957025000552948
1966	1.5525574959987398
1967	1.64994955190219
1968	1.3972609748945657
1969	2.2853660928154196
1970	2.0805714914235764
1971	2.166229702912931
1972	2.3679842967688476
1973	2.280259019129542
1974	6.831154419754955
1975	7.630706385418408
1976	9.040168502755348
1977	14.334332133546399
1978	2.9159181010150443
1979	8.911850732224586
1980	7.7725893997445725
1981	9.900843174204207
1982	8.796830935274356
1983	9.021520199557758
1984	9.095144244837785
1985	8.810744113813039
1986	10.537202693136214
1987	10.186123233524471
1988	7.009908444880425
1989	6.414620797113675
1990	4.922432066701503
1991	6.341197733704796
1992	5.615186488252342
1993	6.056174098942256
1994	5.616829675941477
1995	5.065340086256641
1996	4.645086096054348
1997	3.938374539796151
1998	4.796985606157385
1999	4.085824800283368
2000	4.1080669834336225
2001	3.7847591917992243
2002	5.58109454773099
2003	4.247605984135684
2004	4.256087819095771
2005	4.836190065892209
2006	4.527628689200858
2007	4.3199594888050274
2008	5.380584739528001
2009	6.498964151541979
2010	7.481145008721507
2011	6.149629059023043
2012	6.710248636952384
2013	7.574948822157536
2014	9.599568698139597
2015	14.076244040113911
2016	11.208277337763823
2017	9.344601522914335
2018	7.376754125506493
2019	7.081026658858282
2020	8.525937959827457