Year	% of total merchandise exports
1960	0.9571558796718322
1961	0.7639726578206675
1962	0.6211180124223602
1963	0.4630444576382942
1964	0.4374538400980416
1965	0.4590684449425058
1966	1.1390749040496635
1967	1.443171701584664
1968	1.6481775584143648
1969	1.8640827018168067
1970	1.6695515251156356
1971	2.441009893245651
1972	0.4593997557172276
1973	0.30822714725895495
1974	0.1983866367553049
1975	0.3459783569432168
1976	0.23823324925842473
1977	0.3110104395145557
1978	0.12439247234510503
1979	0.09438680214220771
1980	0.061828263692099775
1981	0.4415206770742837
1982	0.3317667212244271
1983	0.35313873536049567
1984	0.32149143048792883
1985	0.4441966434512591
1986	0.41907486475042893
1987	0.31053455900126115
1988	0.382703407482661
1989	0.47672687122482726
1990	0.47568700698295213
1991	0.6159513381948235
1992	0.4179250628821015
1993	0.6423120546676746
1994	0.4873931937727756
1995	0.4205691010140463
1996	0.5191823247154508
1997	0.35173435221238436
1998	0.37244034726109454
1999	0.29963573021706014
2000	4.689414953331685
2001	5.082624393991849
2002	5.781483377222166
2003	4.9798834717444995
2004	5.425417882500764
2005	4.235756880811368
2006	4.853275577221386
2007	4.549476994191136
2008	3.9071799360940953
2009	6.248094451830249
2010	4.317468855708728
2011	3.6435129840784524
2012	2.9646210326099314
2013	4.296085175566235
2014	3.638192855222712
2015	4.911637166279778
2016	5.662173818596874
2017	4.574019091350076
2018	3.491687281260732
2019	4.280330142674724
2020	4.5150626350949095