Year	% of total merchandise exports
1960	1.562536278179017
1961	1.6536879800113111
1962	1.2900091195172183
1963	1.3289622080919714
1964	1.4241119655607637
1965	1.6526747350045594
1966	1.5320357410145808
1967	1.70940205759171
1968	1.6603818602012002
1969	1.8245313146155215
1970	1.9130062306499174
1971	2.1164942424601865
1972	1.840686493135445
1973	2.1281153236842356
1974	2.7883934309705802
1975	3.4650360526192414
1976	2.6301694712462673
1977	2.719979439687952
1978	2.43718948712126
1979	2.0050044533922846
1980	2.359748288388117
1981	3.861362163971537
1982	4.340458961251106
1983	4.450650119165423
1984	4.163376927772939
1985	4.011799523949164
1986	3.736961428496298
1987	3.490465944012629
1988	3.2508925397919337
1989	2.5874052536312275
1990	2.4046989782451766
1991	2.152244036910518
1992	2.1864658568692477
1993	2.0728783278878864
1994	1.6032040266958063
1995	1.7445618770202393
1996	1.6919063676954105
1997	1.6595234096883855
1998	1.7244701894786434
1999	1.5911272344462022
2000	1.497173218487158
2001	1.8313839123944087
2002	1.9066577338867625
2003	1.8930313599739872
2004	2.064282370483793
2005	1.9752215503962822
2006	1.9841751967511094
2007	2.220442835640034
2008	2.442131790853964
2009	2.914814804146089
2010	2.6789743863533175
2011	2.4672441933980784
2012	2.692752083310615
2013	2.691676154721395
2014	2.8955875093722927
2015	2.7986164872171226
2016	2.8340290772184065
2017	2.6547958840147468
2018	2.4882845532828752
2019	2.474733573433345
2020	2.324605895049384