Year	% of total merchandise exports
1960	19.610151753008896
1961	18.27761627906977
1962	18.878263672504566
1963	15.96292481977343
1964	15.772003034901374
1965	13.569864213753831
1966	16.13641939968921
1967	15.381923177880829
1968	18.467677573822826
1969	16.908009793634136
1970	19.60844061857241
1971	17.5906030654634
1972	5.197946781521034
1973	10.674803219244716
1974	7.3415708261773185
1975	11.737073103826635
1976	8.054426475251521
1977	6.030307389824017
1978	6.061878527277614
1979	4.55304463987532
1980	3.4185397951446457
1981	1.2099728594574053
1982	2.222180311095814
1983	2.718631093502803
1984	3.8153944583887003
1985	2.598436595251882
1986	3.0564269838721767
1987	1.8546900784270337
1988	2.3963291153071267
1989	1.8455743127719395
1990	3.3746950014694113
1991	1.9194531798908392
1992	1.5611300223728832
1993	1.4142394588173681
1994	1.1581953147107074
1995	1.6577905388370169
1996	2.3392546438193085
1997	1.950273906862612
1998	1.4531737790865917
1999	1.2342140852402397
2000	1.096246666546271
2001	1.1927799016242702
2002	1.0633282622869384
2003	0.7489157284617488
2004	0.6543013984265706
2005	0.7889707838734824
2006	0.8797985779620123
2007	1.1333378697484864
2008	1.0390464749090513
2009	0.8583778841967784
2010	0.7243881356102665
2011	0.6563804792335012
2012	0.7567864174555654
2013	0.7082015183611173
2014	0.5059272285684053
2015	0.4369073145608005
2016	0.2785289099728844
2017	0.40703778151736675
2018	0.4081601817564614
2019	0.25880778282429157
2020	0.22698495679845757