Year	% of total merchandise exports
1960	1.3001136981561126
1961	1.3427410733376095
1962	1.0805458693874037
1963	1.0849583678765815
1964	1.2931179256373224
1965	1.318531169940222
1966	1.2115475627070516
1967	2.198431327646419
1968	1.150241408690713
1969	1.0514422689740444
1970	1.848846353338799
1971	3.464418759418339
1972	2.3923246634210154
1973	1.5064798986426549
1974	3.5714028141384855
1975	4.388253979185862
1976	3.4480243549057406
1977	4.049288138331048
1978	4.0171976552431365
1979	5.1567811101602254
1980	6.142068227570322
1981	6.31662220030351
1982	6.401107717767346
1983	4.867619128267786
1984	5.928501053473953
1985	6.368081407914236
1986	4.942403511082319
1987	3.5646947425987876
1988	3.097596997719783
1989	3.4382499138648845
1990	3.426917414614155
1991	2.4565225699243456
1992	2.4618147619565933
1993	2.687011049058636
1994	2.32874758452268
1995	1.892706474873897
1996	2.7649828054771235
1997	3.549774300309251
1998	4.201242348374964
1999	4.167797648232445
2000	4.491928958184981
2001	5.658872325974902
2002	5.454916440815457
2003	5.208347895063258
2004	5.155655235458938
2005	3.822005959111416
2006	4.043707162787644
2007	4.202546561545856
2008	4.175465034237904
2009	3.37928583330079
2010	2.815915444473317
2011	2.716011955157083
2012	2.7961868715582794
2013	3.4291077348719994
2014	3.383494913648377
2015	3.8770315363881402
2016	2.777994083758959
2017	2.760985905683171
2018	2.6914045270365774
2019	2.165581258667371
2020	1.9724842578883228