Year	% of total merchandise exports
1964	1.5832263585793753
1965	0.18804061677322303
1966	0.1303969863807592
1967	0.7928215657199346
1968	0.9990797949257262
1969	1.8923099862079251
1970	3.5705115845063036
1971	4.016506513830756
1972	4.35284205752017
1973	4.3251986159364435
1974	2.867284898534898
1975	1.0460939377322103
1976	5.262951150132839
1977	2.238283644469212
1978	6.206916911449953
1979	5.6710068737715025
1980	5.0428927653920095
1981	9.833311063089297
1982	8.62356968541687
1983	8.623569685663018
1984	6.470360236507368
1985	8.498762099176954
1986	11.766924275886225
1987	11.564902269288703
1988	6.505184831628124
1989	6.67474994016349
1990	6.213989015275535
1991	11.76168650281574
1992	4.396672381811337
1993	12.315883625436165
1994	15.544451998662442
1995	10.936621009157133
1996	9.997825269084485
1997	11.40160374692468
1998	4.909117668315327
1999	5.87510571837824
2000	1.4785487132459232
2001	3.26378577223341
2002	3.3274397811384313
2003	3.622760170827087
2004	1.0800059171100036
2005	2.6409015309122745
2006	4.970310178962113
2007	2.1790722086891035
2008	1.2440214325188923
2009	1.9241446540358211
2010	0.30737142238616694
2011	0.4341500325252567
2012	0.7438590595460365
2013	1.1992857582682992
2014	0.37781745401260014
2015	0.325929687473276
2016	1.0857607350423688
2017	2.1343687805831433
2018	2.054273063226044
2019	0.7535851659041815
2020	0.5369418671974939