Year	% of total merchandise exports
1964	0.09799118079372857
1966	0.5447117566954154
1967	1.1416490486257929
1969	0.36459623719554535
1970	0.004251168480892179
1971	0.2431348712267527
1972	0.024862109309710844
1973	0.0007480690467730172
1981	0.013414343582220328
1982	0.007873542318751474
1983	0.0005220663789971179
1986	0.00584447849282411
1987	0.008190535523167957
1988	0.00032890213516445813
1989	0.0894603288613307
1990	0.03891811059366739
1991	0.003996419881546046
1992	0.7587787923993439
1993	5.732921680304852
1994	1.8711151711096115
1995	4.7298321796506775
1996	4.881157001349876
1997	13.146329826984065
1998	4.038485332525362
1999	7.363516643480415
2000	13.204327793089272
2001	11.331415893963294
2002	12.952349823175291
2003	15.342212821288115
2004	19.90616296230498
2005	28.882921868803262
2006	33.77258762856531
2007	56.23251692686972
2008	53.08596782582773
2009	40.39176740430246
2010	42.17540193623136
2011	39.89516497896257
2012	50.95735750877962
2013	49.770143381060024
2014	49.96012188894414
2015	45.76610303546294
2016	54.009927993976916
2017	61.49516360040324
2018	63.435121598730085
2019	58.82988932448986
2020	57.13346654002157