Year	% of total merchandise exports
1964	0.3179650238473768
1965	0.3710575139146568
1970	0.00419222761001104
1971	0.0014107755032941609
1972	0.010520501827937193
1973	0.001060861631817362
1974	0.0006391083160774088
1975	0.0005770040794188415
1976	0.011594034869059869
1977	0.080414829603749
1978	0.0024255713433299214
1979	0.059461870075813876
1980	0.13088069509747313
1981	0.02042907340008926
1982	0.028366537172271365
1983	0.01719760871345508
1984	0.007294954195366552
1985	0.0038315644277558524
1987	0.21108125025725072
1988	0.0025605110953203667
1989	0.005294889203284121
1992	0.05286714558080898
1995	0.0011171488748103512
1996	0.006951902059070092
1997	0.006013620458611633
1998	0.16443752466380532
1999	0.009612499687092858
2000	0.06682582781639845
2001	0.006472485550952349
2002	0.006651237486960035
2003	0.00826753741442879
2004	0.026812361040464316
2005	0.22135560587241912
2006	0.5354508299764424
2007	0.574679275398607
2008	0.6764859574515588
2009	0.6864844733358857
2010	1.5493018229832114
2011	1.4413304894710635
2012	0.9952955904391448
2013	0.8594523748463052
2014	0.9150076127421827
2015	0.7564443157393594
2016	0.5159880972786668
2017	0.1808984138867377
2018	0.13915081307556446
2019	0.6241654003324051
2020	0.5558929921798516