Year	% of total merchandise exports
1960	1.5077364180137427
1961	1.2957023733162285
1962	0.7490636704119851
1963	0.6848574415167791
1964	1.2830416820609278
1965	1.219470538001708
1966	1.079034548035968
1967	1.342531631075743
1968	0.5651803464924737
1969	0.5961883737345506
1970	1.1651496645305939
1971	3.3666975192956423
1972	1.9068587036124378
1973	0.9975015497905434
1974	2.8547963680160398
1975	4.532966917597614
1976	2.9014521316240733
1977	3.6331194034092187
1978	3.3437036626432564
1979	3.4820087206766313
1980	4.489290701681205
1981	3.4686513285595972
1982	3.713018173324878
1983	2.8748533201069404
1984	4.227917017894408
1985	3.6136606822032005
1986	3.3422325329374587
1987	2.510359550409448
1988	2.1914008575763413
1989	2.407963899310402
1990	2.8262750651969157
1991	1.5481055233704828
1992	1.2346233627565504
1993	1.5848024452148113
1994	1.3933362964272704
1995	0.8756689914059714
1996	1.7918648169057816
1997	2.209436189815757
1998	1.872615777645949
1999	1.823393875057898
2000	1.9621957943462287
2001	2.2459819165244292
2002	2.0755062283777197
2003	0.9977954875452935
2004	1.4087510103752343
2005	0.9359375059486419
2006	0.8591707267833109
2007	0.5274790187153681
2008	0.5462515141719599
2009	0.9321436013590034
2010	0.5583880177647587
2011	0.6289651651330075
2012	0.6714048869523344
2013	0.7640386719936266
2014	0.6835520765113612
2015	0.5530661772820851
2016	0.39599386837579137
2017	0.4377878952946256
2018	0.4129752402902329
2019	0.2824185652336613
2020	0.26585100764916264