Year	% of total merchandise exports
1960	10.325318246110324
1961	6.233062330623306
1962	5.8165548098434
1963	1.6839378238341969
1964	0.23148148148148145
1965	1.8626309662398137
1966	2.480270574971815
1967	1.6094420600858368
1968	1.1764705882352942
1969	1.2589964316674396
1970	1.4154806005069216
1971	0.7411643260825975
1972	0.8526492795674107
1973	0.6132289172221863
1974	0.22867688357538313
1975	2.6361016266036
1976	0.5054140507415692
1977	4.962565130260521
1978	2.4395956233863925
1979	6.050142542625349
1980	3.766489999613138
1981	3.3616035507566124
1982	3.0247371917620853
1983	2.7405562847851157
1984	0.0012356777228930923
1986	0.08034868047789427
1987	0.8945585752101186
1988	0.0953449552904635
1989	2.0015941298852162
1990	0.21903867294271845
1991	0.41451975055456997
1992	0.6102697032866783
1993	0.9305117019959943
1994	1.9354201086510032
1995	2.131541951550959
1996	1.3765833239705891
1997	1.0623616193288283
1998	1.1176846100016697
1999	0.7255155006737091
2000	0.2465288605257522
2001	0.3135466731912583
2002	0.2988881497789623
2003	0.49034943868295794
2004	0.8042996047360831
2005	0.4150233514307001
2006	0.7671737531923538
2007	0.9150201882312236
2008	0.8442064397134746
2009	1.0033113741708772
2010	1.227761100962903
2011	1.134546188237221
2012	0.8699480792728401
2013	1.0565079035720606
2014	0.9975044875900023
2015	0.6331419437108546
2016	0.6325585009395426
2017	0.740026622671392
2018	1.533055727066157
2019	1.1515931487125521
2020	0.9332706965437751