Year	% of total merchandise exports
1960	1.989073357025407
1961	1.7463190334099692
1962	2.0676015821646887
1963	2.1083963785191617
1964	2.4410519951632406
1965	2.447246005528214
1966	2.504031399275869
1967	2.274995010975853
1968	2.594069274856716
1969	2.488731695745002
1970	2.8103180760279285
1971	2.9681794470526865
1972	2.5422002328288706
1973	2.58622494921785
1974	2.916038210155857
1975	3.445186701162297
1976	2.75273859088888
1977	3.2046257483329357
1978	3.339597110461639
1979	3.1507253371946478
1980	3.1443039853715646
1981	3.5123149247493184
1982	3.362795114393471
1983	2.7883525503224544
1984	2.0730320124428347
1985	2.038652412496447
1986	1.8334196600684562
1987	1.461325104725735
1988	1.4954175555028837
1989	1.3069332153348137
1990	1.2235770874032181
1991	1.1743001190307272
1992	1.1023110474712945
1993	1.1903054328009426
1994	1.1493632199069819
1995	1.1293770907893037
1996	1.0810713444948357
1997	0.8659229883579577
1998	0.8946947244167484
1999	0.8463488123453282
2000	0.7092234422462202
2001	0.7165549875935916
2002	0.8147477273260678
2003	0.7150346765023459
2004	0.7160375197446629
2005	0.6817398742936664
2006	0.728060121893411
2007	0.7187404168122017
2008	0.6912177932852137
2009	0.7346069908480074
2010	0.7660870417161095
2011	0.7290185308819647
2012	0.5261717483837931
2013	0.7283936099986306
2014	0.5469952345294146
2015	0.5150614427319995
2016	0.46716702201223526
2017	0.4895695068044271
2018	0.4974279592205562
2019	0.4578648747713118
2020	0.44860472534226725