Year	% of total merchandise exports
1960	0.3189792663476874
1963	0.5628517823639775
1964	0.47770700636942676
1965	2.0805369127516777
1966	0.6329113924050633
1967	0.7255936675461742
1968	0.8064516129032258
1969	0.5436323206107831
1970	0.45748549537795297
1971	0.25595947397389107
1972	1.7615529247631683
1973	0.33071353514416085
1974	7.748952257677525
1975	2.1755412865066863
1976	2.029952969004563
1977	6.885168666373516
1978	6.090732470025466
1979	11.826057180780651
1980	0.6121872351112925
1981	6.051749062851956
1982	6.498754706991469
1983	14.527420964747806
1984	3.855414831462999
1985	6.770613338770993
1986	3.0296153895556195
1987	3.2188345245869465
1988	1.722881367440892
1989	1.9351077073385965
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	0.5106076032586043
2005	2.540707621453024
2006	0.9040463127623025
2007	1.2360399795472254
2008	0.7273920744463331
2009	0.6230797278358366
2010	2.771701972278683
2011	1.9163451748519313
2012	1.1374132483972261
2013	2.2531148800071614
2014	1.85799009900682
2015	1.4014558179371466
2016	0.8722871582595814
2017	1.2270276922505863
2018	3.3050618118440624
2019	1.4098424881275673
2020	0.8600990922129148