Year	% of total merchandise exports
1960	0.48661800486618007
1961	0.22438294689603594
1962	0.9478672985781991
1963	0.42813455657492355
1964	0.04899559039686428
1965	0.20202020202020202
1966	0.3631411711302769
1967	3.9323467230443976
1968	1.7530772099962697
1969	1.553816178652156
1970	0.030230531419677714
1971	0.06151900471564005
1972	0.39612234664883833
1973	0.057476638427060155
1974	0.1917301428743415
1981	2.919631880761002
1982	0.5962418865232894
1983	0.43540336008968367
1986	5.8444784928241095E-05
1990	3.044111326477253E-05
1992	0.0037867732693729703
1993	0.00010836119780160196
1994	0.0003369810531997932
1995	0.0014599508645635993
1996	0.007984720616678577
1997	0.0034142122943867127
1998	0.002298011771433575
1999	0.0007236116484007526
2000	0.36977693876860374
2001	0.3173275008175695
2002	0.3627205081891042
2003	0.4296467598509283
2004	0.5574566392665551
2005	0.8088437966291901
2006	0.9457750873676875
2007	1.163640445786278
2008	1.0129965671346781
2009	0.7603052997108587
2010	0.72596960340011
2011	0.616527493589158
2012	0.9775662785113638
2013	1.2242155504230623
2014	1.514007480893493
2015	2.050909317149971
2016	2.994329309548643
2017	3.4119865357206893
2018	2.9361196883903524
2019	3.1801881135918655
2020	1.3712063803672376