Year	% of total merchandise exports
1960	2.0618556701030926
1961	0.33112582781456956
1962	0.8305647840531563
1963	0.3614457831325301
1964	0.6402048655569782
1965	3.4954407294832825
1966	1.5027322404371584
1968	2.262443438914027
1969	4.363004429133858
1970	3.0817379535906615
1971	6.60794258089391
1972	8.766686400702786
1973	13.04586066759007
1974	14.271711618758967
1975	2.1481047429692075
1976	4.089006355414324
1977	3.480974437818058
1978	3.4423232820969303
1979	2.0126108162000484
1980	1.831587189142836
1981	3.2956296742189544
1982	2.311432809520092
1983	1.8071818673747748
1984	2.7967345466272744
1985	1.6942337266557872
1986	2.214556113747303
1987	1.2668139814253283
1988	2.815084604437122
1989	2.9517540883870588
1990	2.2533776026578387
1991	2.0071997373598323
1992	3.1327371020447683
1993	4.03412120185597
1994	3.9640860577464645
1995	4.458234981397025
1996	5.94078138352838
1997	6.67032498027982
1998	6.867254192937463
1999	7.135123372142268
2000	7.959529981127648
2001	9.267291551219063
2002	8.26972963121174
2003	11.535300977974849
2004	11.044288993743551
2005	10.644695002292076
2006	11.542440966931178
2007	13.228250866187826
2008	14.875293396810136
2009	15.615494720031183
2010	17.574580685611746
2011	18.91640346536771
2012	22.56381058611273
2013	22.229573370330794
2014	21.090193202741244
2015	24.961510635805354
2016	27.511233687603724
2017	27.530492050211908
2018	31.83941837740768
2019	32.61942476198771
2020	33.41421594200264