Year	% of total merchandise exports
1960	3.91304347826087
1961	5.323193916349809
1963	0.3125
1964	0.2785515320334262
1966	1.82370820668693
1968	0.6671159029649596
1969	0.6498506267516708
1970	2.3289200829478385
1971	1.9216277317256971
1972	0.6449235304956699
1973	0.442041114115274
1974	0.8607627583094233
1975	1.1210458578879632
1976	1.07022772833823
1977	2.54066515129532
1978	0.4560896413220969
1980	0.3348719341116843
1981	0.3348719340230098
1982	0.2162471338474429
1983	0.3589981447124304
1984	0.8895035438701262
1985	0.35864377477170944
1986	0.9515872226092148
1987	0.22117328824339705
1988	0.3556112658592293
1989	0.40093559148743907
1990	0.5953369648622798
1991	1.0162806030157239
1992	0.9849648257189955
1993	1.1439213952410927
1994	1.1687987579509258
1995	0.9722013085580223
1996	1.224181973172967
1997	0.3239378586813584
1998	0.4911185646122575
1999	0.6811712469048492
2000	4.747872155457512
2001	9.859048100296665
2002	9.250891235209009
2003	4.054737501285572
2004	3.1654116603978015
2005	5.278356536818441
2006	4.490432047213784
2007	12.391042822510816
2008	10.269092378972843
2009	9.313644821948303
2010	0.24010498668913288
2011	9.568113672810814
2012	0.14338841800911714
2013	5.334514464124977
2014	10.364523350652835
2015	4.14124425562542
2016	4.694578646889008
2017	5.5241152780317115
2018	7.811899345373336
2019	6.970075479488528
2020	6.483728019958722