Year	% of total merchandise exports
1960	4.895474993384493
1961	5.669393374908885
1962	9.038088833018442
1963	7.58461114370078
1964	7.511159519314001
1965	8.215981751918738
1966	4.213211873625557
1967	4.463856627547852
1968	5.924207167886278
1969	4.863367469867026
1970	4.685725336842847
1971	4.27283592494817
1972	5.12588095600989
1973	5.911997067440565
1974	2.9660409736689477
1975	2.8719623374507353
1976	3.118765339443953
1977	3.0867850544676174
1978	6.34965767488525
1979	5.395832715018253
1980	5.030284462455023
1981	3.343777277543226
1982	3.0233522924816403
1983	2.9296472531784863
1984	3.049596378910892
1985	4.364830263238756
1986	4.784017014419003
1987	4.079510480738045
1988	4.126509535274462
1989	5.764063836514932
1990	4.2704190377541815
1991	2.9946918267175207
1992	2.339147905797451
1993	2.0168257035336183
1994	1.922234656066929
1995	3.0415942726754595
1996	2.3530070260142804
1997	1.2517743872961002
1998	1.2215637876873324
1999	0.7537349481580193
2000	0.2519731714472214
2001	0.2556594506580421
2002	0.2948395098424661
2003	0.14695859954950885
2004	0.18337844599036532
2005	0.21854093955806722
2006	0.2626493902083608
2007	0.33220774710090567
2008	0.3558365756335358
2009	0.49602930126658634
2010	0.4057378856329321
2011	0.483664791536497
2012	0.5018279710499014
2013	0.33936470352599674
2014	0.29668847778423874
2015	0.3715077109556785
2016	0.37908822429769745
2017	0.26695874770670736
2018	0.07416781027997268
2019	0.09831047237800468
2020	0.07304869183115455