Year	% of total merchandise exports
1960	3.3891992551210426
1961	1.8256410256410254
1962	1.6449746926970357
1963	0.7441091360066143
1964	0.7477906186267845
1965	0.62901323548683
1966	0.8948812790836416
1967	0.9145964652082561
1968	0.4021289178001182
1969	0.6311445563782012
1970	0.7976934166266217
1971	0.4204687779567007
1972	0.45888743210339017
1973	1.0230585740789822
1974	1.1601796407185627
1975	1.596657136573565
1976	4.8
1977	5.806316510879705
1978	2.4023427805628628
1979	2.6181777083229187
1980	4.125446474085927
1981	3.5759484820092577
1982	5.2938153160870405
1983	3.7001015142028706
1984	3.457331316821899
1985	2.8784368627162027
1986	2.194812488300019
1987	1.1180726106442478
1988	1.2122717851159885
1989	1.3226125997237095
1990	1.676838702143031
1991	1.465729595713797
1992	1.3333032626646628
1993	1.1318391247539143
1994	1.1266410451026918
1995	0.9288944859228752
1996	4.483999610932789
1997	0.16150861615699516
1998	0.146898591530602
1999	1.3379512965003484
2000	0.4161474098399771
2001	0.10531772446049895
2002	0.08263955896545254
2003	0.050285616049390025
2004	0.1463161828725444
2005	0.06184897991371841
2006	0.053160976202761216
2007	0.08504691435832554
2008	0.1701249558000186
2009	0.8150617093369492
2010	0.4390087324021895
2011	0.3268793564293147
2012	0.04401490307957768
2013	0.03650777753811048
2014	0.48133072957435424
2015	0.47289100410921187
2016	0.044651138125140516
2017	0.05092672253757658
2018	0.08816342588265816
2019	0.7843568863988457
2020	0.015153252266673252