Year	% of total merchandise exports
1968	0.07365541292126387
1969	0.033493069511001186
1970	0.25869600251062347
1971	0.07706003788109231
1972	0.1204551350950669
1973	0.37988902673110275
1974	0.8242458787706062
1975	0.6545624166586389
1976	0.2977851002426478
1977	0.878861239265945
1978	1.2922878204495343
1980	1.6112537932918276
1981	2.626819639539872
1982	3.5746153298339833
1983	2.8886911313552375
1984	2.461893456990082
1985	2.461893456907943
1986	2.909872633323202
1987	1.8059388106670298
1988	5.182268424533057
1989	3.674515715170762
1990	1.263316125874146
1991	7.079705582737807
1992	1.4891649524305626
1993	10.682219007988428
1994	8.311326617147497
1995	13.828098156648213
1996	9.963702661206664
1997	13.470324331602532
1998	2.681802637220292
1999	9.244504033755438
2000	2.0991844226533813
2001	2.101305999153207
2002	2.1014441998554445
2003	2.101789543709664
2004	2.101789404222914
2005	2.101791464452932
2006	2.1017926826054114
2007	2.10179277983503
2008	2.101792766624511
2009	2.101792838003748
2010	2.1017925839067404
2011	2.101792961443453
2012	2.101792786411807
2013	2.1017926693916613
2014	2.1017928349945585
2015	2.1017926624711096
2016	2.1017923376286793
2017	2.1017927106419854
2018	1.1359930530444549
2019	4.227579495720731
2020	4.481828270009548