Year	% of total merchandise exports
1964	14.17802904334331
1965	9.370889960543622
1966	7.435230665510931
1967	4.819378798109385
1968	5.798348245010324
1969	7.3777286543243985
1970	0.1983812093318521
1971	0.30733206497877946
1972	1.312434378281086
1973	1.2975962561157202
1974	0
1975	0
1976	1.3605027149045208
1977	15.408093745741928
1978	12.706438275251033
1979	18.77506844082256
1980	24.165528010931094
1981	37.634007644262134
1982	37.75795732773697
1983	42.43314578602457
1984	43.67839267244364
1985	64.26656666643319
1986	65.77106494568142
1987	40.82282003472895
1988	30.570073582487094
1989	17.130212238518435
1990	0.6331419815139513
1991	0.3320396672904103
1992	0.3408307737251387
1993	0.19416070908658004
1994	0.4724813034434243
1995	0.4533441284455552
1996	0.39721540346203227
1997	0.2797756692194694
1998	0.24440188881782038
1999	0.22649417274004124
2000	0.2103106497469856
2001	0.5670040280811139
2002	0.7971255166261949
2003	0.8426372981089651
2004	0.9999173613378508
2005	0.739471302231187
2006	1.269309287632276
2007	6.023124780388291
2008	19.56705901280884
2009	59.10050414769783
2010	45.28707359490337
2011	0
2012	0
2013	12.830123569581122
2014	21.115873391504664
2015	14.276354456912904
2016	9.368089128350995
2017	5.037403591593065
2018	7.834174067509483
2019	3.6812279450540846
2020	1.6490046332176818