Year	% of total merchandise exports
1960	0.43478260869565216
1961	6.083650190114068
1963	28.125
1964	34.26183844011142
1966	34.954407294832826
1967	13.612565445026178
1968	0.19541778975741242
1969	56.3583726015584
1970	54.040516828840325
1971	56.15036809460321
1972	62.12225907499539
1973	56.38170035620789
1974	57.18753022341146
1975	65.84479216058163
1976	56.42613943720235
1977	72.88774967355032
1978	89.32881623153588
1980	76.17657706579782
1981	76.17657705597502
1982	94.26217581744929
1983	71.1743970315399
1984	89.99701403404
1985	82.22966075977304
1986	53.89217832620161
1987	49.277516036372184
1988	39.34751022437947
1989	36.85428353380038
1990	57.23576759774747
1991	75.56339049062869
1992	82.65265061080517
1993	89.25827009420117
1994	73.3209954082238
1995	82.40188010671126
1996	80.21116048999554
1997	80.1946866857361
1998	85.21451617887313
1999	95.28716033534414
2000	91.75590416685947
2001	76.0438532851069
2002	67.60882969561372
2003	81.25312571819948
2004	81.0024782288459
2005	80.26578647427137
2006	85.79294864814135
2007	73.52300697699292
2008	77.74321204419492
2009	86.94001325705833
2010	94.33263150685464
2011	85.04671391495165
2012	93.86823407518405
2013	83.57407252624905
2014	75.97309537510225
2015	86.02371578745132
2016	83.2529412565678
2017	81.63308774678362
2018	75.32530698225386
2019	76.60127407176438
2020	80.26619719719325