Year	% of merchandise exports
1963	0
1964	0
1965	0
1966	2.493039707371387E-06
1967	0
1968	0.0030380418011894676
1969	0.23114838325791381
1970	0.3561890577349384
1971	0.7810605434884952
1972	0.7308097493148005
1973	0.9520423946307607
1974	3.8961850994795713
1975	3.6233373436859555
1976	1.7020525818496124
1978	1.3071893958367167
1979	2.871877005188683
1980	0.9545321824076879
1981	4.347956381308419
1982	3.4672860618736028
1985	0
1995	0.2505032512971633
1996	0.00042281318335664526
1997	0.00011316887923763223
1999	0.00010897767056536534
2000	66.68619899744401
2001	81.67615599024715
2002	69.15454814789602
2003	79.3941833513699
2004	82.42996025754034
2005	85.95641889060752
2006	89.80842651138461
2007	94.55229400268811
2008	94.45011092960756
2009	91.20067304186229
2010	84.95256132681939
2011	82.485132408608
2012	0.00542955620642858
2013	5.010638119416703
2014	50.1544816247277
2015	53.71255032932816
2016	10.625447909552966
2017	12.941789867625268
2018	14.304698499934085