Year	% of total merchandise exports
1960	0.2490819381372123
1961	0.1570857877987677
1962	0.1759212743229298
1963	0.25751599343709447
1964	0.11245995663242431
1965	0.32147888950480413
1966	0.40703397499993527
1967	0.34927939816831555
1968	0.44874866914143763
1969	0.6531899053841814
1970	0.5536868285790542
1971	0.7351115756888891
1972	0.8212227465506939
1973	0.7802288219646548
1974	0.502287882544301
1975	0.7632863167735829
1976	0.6902013886800783
1977	1.3482960736779974
1978	1.4430802832743912
1979	1.5412831557325126
1980	2.5445295801626755
1981	2.4304303118532466
1982	1.7352243143519648
1983	1.225286750967362
1984	0.7737467776145562
1985	1.881797655534086
1986	0.962329151362328
1987	1.0729705539879044
1988	1.5040081151633482
1989	0.9157742275071816
1990	0.6983186300300321
1991	1.2407818463043783
1992	0.641560098874737
1993	1.3108422179001584
1994	1.8894200872220503
1995	1.7267577296676304
1996	1.8808341937514466
1997	1.8332440678547168
1998	2.0665366849422937
1999	2.5014149619094845
2000	1.9682228787314884
2001	2.001000043859889
2002	2.266765300225564
2003	2.121211257225439
2004	3.215322505177171
2005	2.4157018408565616
2006	2.9407117831205145
2007	2.2864132668743715
2008	2.932559936055294
2009	2.9975826423678162
2010	2.916397261152337
2011	3.083717754545268
2012	2.905731440998526
2013	3.4230720878102763
2014	3.5779227752332767
2015	2.4008441554032394
2016	1.4084706218520344
2017	1.2154927493558239
2018	1.223836494931983
2019	1.081432936732781
2020	0.925761369968159