Year	% of total merchandise exports
1973	2.013422818791946
1974	2.1789962384357318
1975	0.808346649121158
1976	1.6963987332707395
1977	1.1358529570375695
1978	5.993195121247945
1979	0.007692159766158344
1980	1.1998866248858375
1981	0.0014011685745912092
1982	6.973876507124589
1984	0.15079903245721457
1985	0.0769650703872417
1987	1.2115670362327124
1988	2.4599881446354477
1989	0.002438152206200592
1990	0.661003160213837
1991	0.19284324005159387
1992	1.1397087556350376
1993	0.06325279144375667
1994	0.017979623099981933
1995	0.03694808793861758
1998	0.31919203219554865
1999	0.02066349180673168
2000	0.0026856990335507726
2002	0.009851986933643767
2003	0.009661051106536499
2004	12.232680318043831
2005	8.798532896859829
2006	14.032082348620852
2007	9.320614650914628
2008	13.237122119687623
2009	19.179270462047764
2010	7.651669708427438
2011	8.388877827839833
2012	11.075797520281265
2013	0.9417883295811665
2014	1.2980447847115182
2015	1.1029738534165916
2016	1.3308927659766085
2017	15.849614868287553
2018	15.695463608172114
2019	13.715186676687786
2020	9.016748119799468