Year	% of total merchandise exports
1960	0.8542343983491957
1961	1.033609462304224
1962	0.8516468973829622
1963	0.7296183908734094
1964	0.8244008244008245
1965	1.245968108441942
1966	1.1462345450681946
1967	1.1748830855760022
1968	1.4198568087217875
1969	1.5560243290135252
1970	1.6409573482535709
1971	1.6878143450517813
1972	1.7112693315667091
1973	1.3047409466167208
1974	1.114371407506152
1975	1.3424554981462058
1976	1.2889665727199675
1977	1.131685953391392
1978	1.2051514082245471
1979	1.1920150183440639
1980	1.8495070467594843
1981	2.223169387130125
1982	1.2267964045904451
1983	0.8354018442081554
1984	0.7206214542954812
1985	2.0929820781531716
1986	0.8388047091430944
1987	0.846480571228988
1988	0.879060601883194
1989	0.7826976864604439
1990	0.48685452528493284
1991	0.9819477862294913
1992	0.7054532775642459
1993	1.2949567992002495
1994	1.8049440447409553
1995	1.9866302501458026
1996	2.1110231083458415
1997	2.1508996957188966
1998	2.4121574674976043
1999	2.9015198435556204
2000	1.7852035199514944
2001	1.918733459431836
2002	2.122206362068715
2003	2.2822736378304285
2004	3.5132471876850166
2005	2.7638073745386413
2006	3.357742515631481
2007	2.376808695381072
2008	3.2222928539337183
2009	3.2363011024716566
2010	3.124093108615082
2011	3.700077857424635
2012	4.1078175292459616
2013	4.273155329989215
2014	4.464557586557207
2015	3.388711712731999
2016	2.1223882611365306
2017	1.7781707005520513
2018	1.948630043018905
2019	1.5212861775750697
2020	1.656688771591044