Year	% of total merchandise exports
1960	1.73845937982321
1961	1.51467099671441
1962	1.65270963219833
1963	1.71358763839669
1964	1.1763763603416
1965	1.40201380164236
1966	2.12585250677334
1967	2.35605328372201
1968	2.12614922328357
1969	1.9478597590302
1970	1.94080912299756
1971	1.69313783438519
1972	2.3478184005319
1973	2.42418668563746
1974	2.60604192355117
1975	2.82601529782819
1976	3.28492781533238
1977	3.59031113086183
1978	3.39548399637967
1979	4.20821734109277
1980	4.42733908427339
1981	4.07607796345474
1982	3.22639281992008
1983	3.75612724450902
1984	2.87815284788252
1985	2.66053271268796
1986	3.47124185968992
1987	4.24868170093145
1988	4.13139389706246
1989	4.67629211816879
1990	4.95001886236541
1991	5.00655096579137
1992	21.5578965196153
1993	17.4546718178287
1994	12.7784271705955
1995	11.3644539827071
1996	11.578410339595
1997	11.4241766627716
1998	9.29007753858588
1999	10.6293586305292
2000	12.8634002339417
2001	8.82863987752842
2002	7.51682245096733
2003	9.14018663699154
2004	11.9252181290801
2005	14.7826131884175
2006	16.2595667745378
2007	17.5741718219691
2008	19.7282339962982
2009	16.015565907615
2010	18.3051806147155
2011	18.2495222915086
2012	17.9613600824972
2013	17.1979535694991
2014	15.9655982101899
2015	13.435340869961
2016	12.4359842513317
2017	13.098516486952