Year	% of total merchandise exports
1960	2.4
1963	0.5102040816326531
1964	0.4716981132075472
1965	3.1746031746031744
1966	0.5747126436781609
1967	0.7874015748031495
1968	0.06930967563071805
1969	0.40622050798079684
1970	0.3095290736237011
1971	0.1067374778714985
1972	0.18649137708187158
1973	0.9127073241153636
1974	0.7946743542085499
1975	0.2487753022017162
1976	0.18715096345315987
1977	1.0650084652923015
1978	5.909937734205101
1979	3.5495552477205607
1980	6.333350396904551
1981	16.540752641394846
1982	0.10419176102144062
1983	0.17598270953150458
1984	0.6724307751206842
1985	3.378122602604494
1986	0.07569884627663152
1987	0.13743434579830877
1988	0.48987095804330516
1989	0.5713550380069612
1990	0.531589960913341
1991	1.661858933451352
1992	1.2978322995144747
1993	0.6907689599868098
1994	0.3489397599940623
1995	0.47493348840482913
1996	1.3202907845801641
1997	0.3368353515968288
1998	0.3470080831606105
1999	0.26268190034888145
2000	0.6092260564347389
2001	0.39425778416837143
2002	0.557699035390843
2003	0.5807858607806762
2004	0.4947328039710717
2005	0.7356838476143013
2006	0.7529896230921155
2007	0.622299355915027
2008	0.17910889899880306
2009	0.32076878904884565
2010	2.1496241270983285
2011	0.6849816934196583
2012	1.1102018946314665
2013	0.5782522972499197
2014	1.0908117417359353
2015	0.9677006437473785
2016	1.1570381334582722
2017	0.48913599814159603
2018	0.7416335786152902
2019	1.9120881563615668
2020	2.1452159391765155