Year	% of total merchandise exports
1961	1.9083969465648856
1962	1.9305019305019304
1963	3.6363636363636362
1964	5.978260869565218
1965	4.021937842778794
1966	3.551401869158879
1967	3.820598006644518
1971	3.621969862415374
1972	5.151006711409396
1973	5.786290322580645
1974	4.246505945108323
1975	3.1560313113711174
1976	4.3848835232103385
1977	2.3437100649184686
1978	2.7709643733152003
1979	2.173426662831208
1980	4.2974209992600105
1981	5.802082624378956
1982	3.6822603056970817
1983	0.2899824253075571
1984	0.33297979922551363
1985	0.5811475727403045
1986	0.42644549971947554
1987	0.004010756013440664
1988	0.001687476880349809
1993	0.5641833508030102
1996	0.1315799819411893
1997	0.36041804265816035
1998	0.36772734056869705
1999	0.45248743245093653
2000	0.3448044831245964
2001	0.31106426263195786
2002	0.13422180697408775
2003	0.14571645923668414
2004	0.3935351184223208
2005	0.29667104993690246
2006	16.947270657533036
2007	20.41521692221465
2008	0.8763307096450719
2009	28.620240548297232
2010	7.2488096322008175
2011	31.685868308789004
2012	41.75359221097574
2013	37.14572186859883
2014	25.806577032989697
2015	0.6430319828557882
2016	21.202963664594794
2017	6.763739960444927
2018	2.528064691006194
2019	15.552301555548977
2020	42.15647448851345