Year	% of total merchandise exports
1961	8.015267175572518
1962	10.81081081081081
1963	7.532467532467532
1964	7.880434782608696
1965	15.539305301645337
1966	3.177570093457944
1967	0.6644518272425249
1971	0.5295916138894955
1972	4.001677852348993
1973	8.400537634408602
1974	6.4606490449086635
1975	9.963211904959477
1976	9.162982485971774
1977	25.123958493073662
1978	10.38200937416519
1979	5.296129382810752
1980	9.696604270013978
1981	6.720887497447764
1982	9.9235757295044
1983	6.392794376098418
1984	6.541203167007868
1985	5.912207973344698
1986	15.705845323075957
1987	3.2132446145549975
1988	0.7741365091561685
1989	0.684098365398272
1990	0.11989287821790777
1991	0.3518559908842288
1992	2.737017991833661
1993	29.6213280090331
1994	0.686977143553215
1995	8.263248800509982E-05
1996	4.87529668568537
1997	0.8615602172715878
1998	8.09898994296621
1999	1.3510413950696707
2000	0.8473060942287256
2001	0.4328085959436222
2002	4.40219629166797
2003	3.1466572743903733
2004	2.958330714118757
2005	0.7420304719943969
2006	1.7276220146098094
2007	21.902995606832572
2008	0.19795630235823158
2009	2.0835999230204907
2010	2.6115229899070087
2011	8.085693762328
2012	1.927908093283015
2013	1.5225390220865884
2014	2.016646780386727
2015	0.10951344792054395
2016	2.191143710021815
2017	0.2728612256799036
2018	0.271335734139021
2019	24.71681624013623
2020	2.2977245237907553