Year	% of total merchandise exports
1960	5.228398458998349
1961	2.3542600896860986
1962	3.8834951456310676
1963	5.577689243027888
1964	2.6476578411405294
1965	7.893388006150692
1966	5.673408978786384
1967	3.9234002802428773
1968	5.983641842445114
1969	7.763756645697419
1970	5.947574227401731
1971	9.775690294929671
1972	10.65499791829082
1973	17.425314519416162
1974	12.804756223563057
1975	11.828735153488859
1976	9.736681618233453
1977	12.191240844997989
1978	8.244018665391529
1979	15.576341417100695
1980	10.564125636609715
1981	5.216411293847326
1982	7.156669682615714
1983	12.522511109222378
1984	10.811071710893058
1985	12.347138438541801
1986	12.223162265464211
1987	11.455148006922368
1988	8.936159964711466
1989	13.553186530834077
1990	21.885712772246134
1991	24.415092186473384
1992	15.566511011981024
1993	11.372708012906621
1994	19.20506202545824
1995	19.68798639749689
1996	18.226884613429565
1997	8.715766068965033
1998	5.263683332836014
1999	9.040693189564703
2000	0.13305637878587467
2001	0.13156924781146212
2002	0.11573348375284492
2003	43.34189868045302
2004	68.76579104486899
2005	71.98666771159087
2006	0.07615925413566699
2007	0.022096460862176683
2008	2.7645940180283217
2009	2.257510349903809
2010	1.2793969218735324
2011	0.5909272326793267
2012	0.013610819710131145
2013	0.06238344859378353
2014	0.0224127128261471
2015	0.1961270122823989
2016	0.2871022185486273
2017	0.9405434442288741
2018	1.0058041645403903
2019	1.7494976103485802
2020	1.7494976448458184