Year	% of total merchandise exports
1960	0.05686664771111743
1961	0.2048580626280363
1962	0.2898550724637681
1963	0.39421813403416556
1964	0.2791346824842987
1965	0.04666355576294914
1966	0.816231343283582
1967	1.6288951841359773
1968	2.9491833030852996
1969	1.6305478141508258
1970	0.6298590612397622
1971	1.2547305364984922
1972	0.6469196911075954
1973	0.43010752688172044
1974	1.9651181245848446
1975	2.8742048552512007
1976	1.9056153400845353
1977	2.2735149372703956
1978	1.1804777902202312
1979	1.6242224604691393
1980	1.378590469219797
1981	2.825734003772313
1982	3.1156294132440854
1983	4.333063390931886
1984	4.065756709397768
1985	4.223270121664809
1986	3.4436125351922207
1987	2.59700134450586
1988	2.494661155488752
1989	1.1537625812220673
1990	2.046567281391223
1991	1.3736106170964277
1992	0.7268185490265211
1993	1.3458040447901716
1994	1.186667569485258
1995	1.3614216685942846
1996	2.2017329356414095
1997	1.8179987295281606
1998	0.707722033730877
1999	1.374443244738223
2000	1.855151670775258
2001	1.4764414945708186
2002	1.7047068803693195
2003	1.5522978450668874
2004	1.715981099016554
2005	2.4414277524570074
2006	2.7680549918846156
2007	2.459620710692543
2008	3.2857468040795217
2009	2.8633406426080135
2010	2.786889545936504
2011	2.8344152201854365
2012	2.7877921376909818
2013	3.501443674079152
2014	3.6147287004973
2015	4.316721299949706
2016	4.709600375142306
2017	4.434211391792056
2018	3.1525317956704804
2019	3.4271954868590395
2020	3.4727080854463743