Year	% of total merchandise exports
1961	0.06059687926071808
1962	1.6809158093029994
1963	1.896040242486779
1964	1.87172150691464
1965	1.1792720263068375
1966	1.5512998823151813
1967	2.864676974709337
1968	2.7753686036426712
1969	2.7536922343973322
1970	3.908794788273615
1971	3.048103909666471
1981	14.541046849634142
1982	12.1114377910005
1983	10.543885181531426
1984	9.21059886789561
1985	9.927676278161684
1986	9.361845327535478
1987	10.809215596656378
1988	13.631096976828436
1989	12.208800250663291
1990	9.225256283759057
1991	0.01399835058125682
1992	0.1493050254807127
1993	6.555936534237975
1995	0.40257228621052904
1996	5.74397278022454
1997	1.140723719991351
1998	1.1945948963314292
1999	0.007939284217840754
2000	3.696354294426502E-06
2001	0.0005362861633230108
2002	0.001263812222418991
2003	1.230190761385665
2004	2.651372626146415
2005	2.4325194242192185
2006	1.2757530976681304
2007	2.025495720613082
2008	2.2912426678437443
2009	2.3676080858791044
2010	2.5991602435242913
2011	0.13024190147467535
2012	0.19495628612660487
2013	0.21370527199957493
2014	0.4111712501982589
2015	0.6108743128035653
2016	2.2269072767013176
2017	3.09471800838357
2018	2.497799818809935
2019	3.4904229730554244
2020	13.732129435650013