Year	% of total merchandise exports
1960	1.1267035487788422
1961	0.8536982730531119
1962	0.9485258579023683
1963	0.9895257645139217
1964	1.5241160600179868
1965	1.5593952483801294
1966	1.293771936984736
1967	1.4150197628458498
1968	1.6493121532264194
1969	1.6004299662595922
1970	3.2301291693527205
1971	1.9929096317626764
1972	2.8499014106558174
1973	3.1780701796495334
1974	2.6438284959498715
1975	2.1143323496293034
1976	1.9174305179773519
1977	2.30844681449445
1978	1.960987250427454
1979	1.5300962257036563
1980	1.8941516322910166
1981	2.641238459386366
1982	2.285302275428876
1983	1.8878141735305956
1984	2.0122108953735727
1985	1.7176728658425837
1986	1.1178383825683578
1987	1.068206113359612
1988	1.603544815138218
1989	1.260347270535722
1990	2.0239977114095478
1991	0.5509555274616653
1992	1.3155630713163495
1993	0.7905112415445545
1994	1.458323558374366
1995	1.2912098355268096
1996	0.6995780523974932
1997	0.6579132666663989
1998	0.7210273380689237
1999	0.6155614613338687
2000	0.5747807537036302
2001	0.6120145750996067
2002	0.6075750178455603
2003	0.6720012495387763
2004	0.5891030481817096
2005	0.5661612486063786
2006	0.6653875798496258
2007	0.5797988451448651
2008	0.7771758668385687
2009	0.5707356638753823
2010	0.6334653707581689
2011	0.6564036884073519
2012	0.6847451786414658
2013	0.8239137874158398
2014	0.7583454871606289
2015	0.9826813013928156
2016	0.7374668973820043
2017	0.9199458841433672
2018	0.6769157085433548
2019	0.7664497431823721
2020	0.7090463416886787