Year	% of total merchandise exports
1960	4.316546762589928
1963	2.727272727272727
1964	1.384083044982699
1965	1.9157088122605364
1966	1.2944983818770228
1967	2.0761245674740483
1968	0.2840909090909091
1969	5.789976401842903
1970	6.341731898238747
1971	3.0899106630604045
1972	4.359309754993208
1973	5.090521831735889
1974	5.787529154368511
1975	12.527290840875851
1976	4.923944624850453
1977	3.1473691978451774
1978	3.827918003067912
1979	2.398370917867109
1980	2.1612814234973623
1981	1.675041876046901
1982	4.74025066393328
1983	0.3743180641650185
1984	5.4965900891464745
1985	3.5558010571007714
1986	0.8449085244787408
1987	1.1585470328111656
1988	1.1281898313538157
1989	0.9557615531409549
1990	0.604658799519676
1991	4.992482430275042
1992	7.777283854640363
1993	4.947917540071545
1994	2.8363132570022587
1995	4.4587632342362085
1996	9.171626597892606
1997	5.919483865020904
1998	1.2762162963057715
1999	1.3992065370432027
2000	2.167353596596881
2001	3.015628462275964
2002	2.2085722933173986
2003	3.8908353899612105
2004	48.50396835907679
2005	15.264721720338908
2006	8.278297781841236
2007	2.7068179162771675
2008	5.349340567586383
2009	3.2549719810265847
2010	3.455528193488881
2011	20.550599756613458
2012	9.112130042838874
2013	6.635706257391074
2014	1.7447387657238356
2015	10.896987427092943
2016	17.796853943572195
2017	15.451121045577395
2018	18.737731459432503
2019	19.224974778743224
2020	23.511113896982767