Year	% of total merchandise exports
1964	0.03315649867374005
1973	0.046473260447769865
1974	0.05193777360077165
1975	0.08194367006268269
1976	0.007940822547049375
1977	0.0037444243181637337
1978	0.015194005747675316
1979	0.012777664642205425
1980	0.02586520714518364
1981	0.024935484381679147
1982	0.04848869552184856
1983	0.046437923985427114
1989	0.09605021414472552
1990	0.04283242467098543
1991	0.5471880576951959
1992	0.2631453831299819
1993	0.2253838062667475
1994	0.3793324337984583
1995	0.4624555062377416
1996	1.6552257935851002
1997	1.5584155016174621
1998	1.0430609246397848
1999	8.9015483129731
2000	2.6556119698751415
2001	0.5760155909116954
2002	0.4670188599534047
2003	0.8484140840771728
2004	0.28089428326372073
2005	0.4355857027373525
2006	0.4396163338061222
2007	1.0336253919714762
2008	1.2481124787757059
2009	1.1321812684475838
2010	1.3620774146850252
2011	1.8330187099559647
2012	1.8108857981227438
2013	0.8162150012199001
2014	1.242484554033809
2015	1.3143308952486636
2016	1.9158851166903252
2017	1.2382855376858724
2018	1.4566649664942874
2019	1.8026444740896301
2020	1.7805037189813726