Year	% of total merchandise exports
1960	0.3189792663476874
1963	0.5628517823639775
1964	0.3980891719745223
1965	2.0805369127516777
1966	0.5625879043600562
1967	0.7255936675461742
1968	0.8064516129032258
1969	0.3691408341574959
1970	0.40307581267523523
1971	0.23672243626395353
1972	1.0511588003479808
1973	0.2486649105382102
1974	6.453777002549309
1975	1.0819066505673414
1976	1.4884230686202335
1977	4.7948991770839875
1978	6.082063269681794
1979	11.817408402376472
1980	0.6121872351112925
1981	5.307283699507472
1982	5.315321155934456
1983	2.1788915941380047
1984	0.28345976086962144
1985	0.342645323856271
1986	1.1196218546760803
1987	1.052449095192438
1989	1.6487023117288324
1990	0.9377486168207901
1991	0.4772130756382725
1992	1.2549244580294998
1995	0.27896995708154504
1996	0.42881646655231564
1997	0.05202011444425178
1998	0.034891835310537335
1999	0.12839325018341893
2004	0.34426031636390264
2005	0.9505957954000652
2006	0.16066407085745582
2007	0.5069517666612295
2008	0.3106313255324286
2009	0.26934597968169954
2010	0.47274298676941984
2011	0.8055508046190825
2012	0.4648366838748832
2013	0.8012544883492305
2014	0.7541630683227167
2015	0.5996082415226186
2016	0.5117084367985898
2017	0.7106290924851534
2018	2.751261035085912
2019	1.0027954576700209
2020	0.5250529504939929