Year	% of total merchandise exports
1960	1.2849162011173185
1961	0.5948717948717949
1962	0.8496023138105567
1963	0.5236323549676175
1964	0.6934058463630184
1965	0.34071550255536626
1966	0.47727001551127546
1967	0.6550488196761834
1968	1.289178001182732
1969	1.5050370190557107
1970	0.8073041806823642
1971	0.46519949901592417
1972	0.9365049634763064
1973	0.5618870924993374
1974	0.5052395209580838
1975	4.051022652298219
1976	1.8271844660194176
1977	1.2459784119248414
1978	1.6160631125930296
1979	1.4905746906590218
1980	3.340066804792112
1981	2.5685578039127943
1982	1.8693897390743095
1983	2.042036200653662
1984	1.196430175795873
1985	1.1442664233655735
1986	1.4626536597541444
1987	0.7610056158176817
1988	1.6539367954797126
1989	1.3027006250722013
1990	0.6424495016185798
1991	0.9269556832317036
1992	0.8858696826059896
1993	2.903958264070176
1994	1.0946723683053448
1995	1.0129900110742558
1996	0.9386246474078397
1997	0.8770684153541036
1998	1.6393247581180148
1999	1.634371781733094
2000	1.402994853038865
2001	1.2841362685256827
2002	1.6312298286984284
2003	1.2606126952969385
2004	1.249365326769959
2005	1.4629859839054298
2006	1.6969064994132539
2007	2.0631472694465103
2008	2.1849001419918364
2009	2.403806741532149
2010	2.7666816190216497
2011	3.272806237282079
2012	2.505044505113156
2013	2.8301259537047416
2014	2.6887377063565125
2015	3.6480134959990425
2016	2.9339394355378
2017	3.094388151888012
2018	3.386192758833791
2019	3.1919313699732172
2020	3.1440138693451343