Year	% of total merchandise exports
1960	20
1961	7.18954248366013
1962	12.745098039215685
1963	0
1964	0.7633587786259541
1965	2.18978102189781
1966	3.5296320569235005
1967	5.76997050903962
1968	3.812159628604589
1969	3.015463917525773
1970	2.853464921690635
1971	5.766258471049816
1972	2.831688596491228
1973	7.5898135516143705
1974	8.289987951453172
1975	6.129857012089265
1976	3.809096428477153
1977	2.6201403559894128
1978	1.7383953838803337
1979	1.6738496364981932
1980	3.7319492429428904
1981	10.79569067485055
1982	2.9905997837118377
1983	11.960877026773117
1984	3.118079751107841
1985	4.035444693873818
1986	3.7375392428309104
1987	10.375644628571347
1988	4.630847887036979
1989	2.8934463800805363
1990	1.4177227346522077
1991	60.52997527806807
1992	17.605635232515997
1993	1.4607002728181788
1994	9.247273141882719
1995	6.620514896544629
1996	0.972733875528853
1997	2.0819003201413935
1998	0.10262154609218312
1999	0.38785768159736833
2000	0.15740050650411244
2001	65.49872532434627
2002	0.2151458977651505
2003	0.06076924439162407
2004	0
2005	0
2006	0.11156148951857257
2007	0.08881602213127246
2008	0.12410266581441146
2009	0.03620346248571183
2010	0.013164689141381124
2011	0.003900484968421078
2012	0.0022792294162736287
2013	0.010034947202461387
2014	0.00012931051248464182
2015	0
2016	0
2017	0.1420508562697791
2018	3.773117256648277E-05
2019	0.018568948473981176
2020	0.009707226357257626