Year	% of total merchandise exports
1960	0.4053645180678238
1961	0.3235737484242812
1962	0.31732037807965524
1963	0.42927624355549043
1964	0.47585482678990115
1965	0.6078374658027684
1966	0.5722482797404121
1967	0.6571135844085761
1968	0.7447915742551046
1969	0.46525385104563105
1970	0.5600544347525676
1971	0.6805154363973547
1972	0.8293478975589248
1973	1.5350652441014079
1974	3.18079426678916
1975	3.5006715279727443
1976	2.04847506268645
1977	2.1867980349256864
1978	1.7019331939191968
1979	1.8636888977041743
1980	2.09719232625455
1981	2.7205322599307578
1982	2.8495533622969433
1983	2.856631029192279
1984	2.572481262877712
1985	2.6999806361733136
1986	2.4403449019277104
1987	2.239832667766821
1988	2.314357322533042
1989	1.807113929735257
1990	1.7965410652878038
1991	1.5427498146031757
1992	1.7029497520678127
1993	1.4749237137717837
1994	1.2631650779239452
1995	1.2722448488063307
1996	1.4228582589246637
1997	1.4668667091965892
1998	1.2323196158269596
1999	1.1096908968155228
2000	0.9833615944552991
2001	1.3068159579826404
2002	1.449023979454538
2003	1.4842062369781182
2004	1.7032566554543838
2005	1.776957101656453
2006	1.8405104524356766
2007	1.8334442177794132
2008	2.243480787028487
2009	2.484788864586181
2010	2.5131482360964066
2011	2.6617144356181814
2012	2.534230087084785
2013	2.5690007250835882
2014	2.5309405497825526
2015	2.448236260412672
2016	2.5378581467427463
2017	2.588214847712944
2018	2.2027241995878586
2019	2.5398858925924594
2020	2.662998901628459