Year	% of total merchandise exports
1971	0.0025055121266786932
1972	1.037311142965748
1973	0.018392246603242454
1974	0.04585530864479706
1975	0.00862738331464067
1976	0.020202394320433543
1980	0.003794607597863371
1981	0.36042884479278614
1982	0.23892837969820255
1983	0.3350688806753432
1984	0.12418677243053652
1985	0.10298335701768915
1986	0.07713662729643758
1987	0.022653391152198
1988	0.004938951009604934
1989	0.04303030795729227
1990	0.04496977932751898
1991	0.018930768742990024
1996	0.0009463342320741958
1997	0.01634812631303254
1998	0.0004647384221931378
1999	0.005454408370986081
2000	0.2579283491997958
2001	0.0034970575092464072
2002	0.012479662683456875
2003	0.729359478246252
2004	0.05650506433716088
2005	0.15242641344733857
2006	0.14263522558930508
2007	0.12265600554323301
2008	0.09039282304877377
2009	0.103001259994035
2010	0.09059237729790333
2011	0.07057521980811629
2012	0.019749706395055872
2013	0.01703784811906162
2014	0.01577575707125239
2015	0.04860299587108762
2016	0.04854788702475969
2017	0.05708864278047216
2018	0.10113578082051591
2019	0.03537717602371414
2020	0.04135615456368179