Year	% of total merchandise exports
1960	4.6564369812777455
1961	5.593965509706404
1962	5.354810260335633
1963	4.245783057400305
1964	4.389493023486767
1965	4.455050173255529
1966	4.992775822686914
1967	7.331988433156179
1968	6.841202333990795
1969	6.608515191802587
1970	3.702284840556338
1971	3.2856291713558377
1972	3.43061177719488
1973	4.028500408459257
1974	5.4359405701116685
1975	6.842625316051169
1976	6.966884423766792
1977	6.964902182318906
1978	6.549433777892888
1979	6.565356040984667
1980	8.658791457007577
1981	15.774664375259025
1982	17.80501838053006
1983	15.672671587064132
1984	14.41635588571917
1985	14.634985985615213
1986	11.576685191456
1987	10.708416673656176
1988	11.175695487139942
1989	9.056365994954879
1990	7.927057410178784
1991	7.91270696340902
1992	5.177380911271043
1993	4.682766194919732
1994	2.8926391639296036
1995	3.0885680470894763
1996	3.0735505999961563
1997	3.091256708131106
1998	3.3529048112227455
1999	3.293259117232588
2000	2.855004150360405
2001	3.626190606619637
2002	3.3081889165566745
2003	3.3290475836101563
2004	3.7605147409986244
2005	3.613131863748927
2006	3.3606420330952473
2007	3.693052265933084
2008	3.6336675619365923
2009	4.899446247000302
2010	4.4811493404034985
2011	3.9095319154601684
2012	4.992643320456071
2013	4.513351988959728
2014	4.965199189407179
2015	5.3064530067691775
2016	5.747665826551834
2017	5.185850885362645
2018	4.61278101076308
2019	4.4918798184140085
2020	4.3307540920829