Year	% of total merchandise exports
1960	6.474820143884892
1963	1.3636363636363635
1964	0.34602076124567477
1965	0.7662835249042145
1966	0.3236245954692557
1967	0.34602076124567477
1968	0.2840909090909091
1969	0.14889313406000673
1970	0.3638698630136986
1971	0.43439062371936726
1972	1.0514665190924184
1973	0.09850905218317359
1974	0.055728704410823754
1975	1.6957415689848865
1977	0.1131527808525816
1978	0.00836703388648724
1986	1.7655080490635782
1987	1.0246859679281421
1988	0.44840614192805334
1989	7.626229081649319
1990	60.1320866581345
1991	0.6034395108447679
1992	0.45277094302978793
1993	0.017324802447606046
1994	0.04575369741850261
1995	0.026981298650719795
1996	0.009207211039526476
1997	0.026116095499683988
1998	8.20207287733663
1999	14.628862001530358
2000	3.9612659158117602
2001	2.5778429672298375
2002	2.56030116542157
2003	1.497860269974434
2004	0.7121169604015478
2005	2.5662640412224182
2006	3.962267331063706
2007	15.809239995237077
2008	20.27034422105366
2009	12.892626885273048
2010	9.304545795019434
2011	14.388836209244356
2012	14.461226626908743
2013	18.687023487554182
2014	31.172686891768958
2015	4.50621609943239
2016	37.449892660536214
2017	17.752134706122764
2018	22.420220142082155
2019	19.772511176507127
2020	20.61606968347979