Year	% of total merchandise exports
1960	1.6238159675236805
1961	2.393617021276596
1962	2.75
1963	3.8932146829810903
1964	1.0486177311725453
1965	1.0380622837370241
1966	1.4466546112115732
1967	0.891089108910891
1968	1.0466222645099905
1969	1.3851761846901578
1970	0.8335438241980297
1971	0.9767241928293957
1972	1.2968792157568128
1973	1.5250390421655389
1974	1.9710399232130538
1975	2.394226522329725
1976	0.7059879024362458
1977	0.41012297680176185
1978	0.3841894289102545
1979	0.1682224652368156
1980	1.3399037510712637
1981	0.6584196399211834
1982	0.16969774590163933
1983	0.42037715109067814
1984	1.5346726782266218
1985	2.056157221271531
1986	2.0561572213184456
1987	0.3080699766654527
1988	0.475376765159606
1989	0.6607284831858252
1990	0.6869546596328311
1991	0.4285654851626282
1994	0.8830818413390871
1995	0.5476856473736135
1996	0.1755528914228044
1997	2.926502887699287
1998	0.8580317834919509
1999	1.66262507443438
2000	0.6389175022205053
2001	0.3709357993688183
2002	0.32375717342636523
2003	0.4954235505315157
2004	0.804940729274167
2005	0.9993168208590133
2006	0.7869496589344256
2007	0.9757847246762427
2008	0.9307361823295468
2009	1.4660620479055617
2010	6.64415238821085
2011	2.1945928216481696
2012	9.029394662502014
2013	31.114207855604036
2014	27.22930329140944
2015	27.51980960715076
2016	30.53337717837557
2017	31.200744337012786
2018	32.019734778768424
2019	29.66595110224699
2020	29.273418237198783