Year	% of total merchandise exports
1960	5.412719891745602
1961	4.521276595744681
1962	6.375
1963	5.784204671857619
1964	5.910390848427073
1965	4.1522491349480966
1966	5.605786618444846
1967	5.841584158415842
1968	6.470028544243577
1969	8.84736246700465
1970	7.558115848739906
1971	8.121059670126728
1972	7.405941781335253
1973	10.041853201457576
1974	12.743333633282342
1975	20.97094094019017
1976	13.081959392344855
1977	6.943246791876861
1978	1.7683821247374216
1979	6.834665792452244
1980	11.56988406807116
1981	7.753445678467918
1982	10.544904634300126
1983	7.845059578186932
1984	7.006406048613141
1985	4.030897129965716
1986	4.030897130532448
1987	8.88142543061007
1988	4.955262845615284
1989	5.867050508051058
1990	12.0018219084491
1991	3.8513557502581577
1992	6.834161256122007
1993	12.068008327550313
1994	8.676946296181224
1995	11.588012515355793
1996	10.211332479716495
1997	10.415595390013381
1998	9.505673114569307
1999	14.452977077824288
2000	13.934847351110246
2001	51.71449592438613
2002	15.807337148050058
2003	29.279566963419313
2004	8.793962840642353
2005	12.236946924026405
2006	10.032089758391994
2007	9.46962197296922
2008	8.87047780401604
2009	7.169229211618217
2010	6.220934755136595
2011	5.302455712439237
2012	5.932169281262059
2013	4.213327045479004
2014	3.983672657687387
2015	3.387601835172532
2016	3.2527112604732684
2017	3.168110056726016
2018	3.805097157281103
2019	3.541630194470333
2020	3.455275491025303