Year	% of merchandise exports
1963	3.3710917573634362
1964	2.7240826055652585
1965	3.4182727396930837
1966	3.2789012336468923
1967	2.585305082229845
1968	2.9509297283078966
1969	2.819442249643166
1970	2.571402446367053
1971	2.5159198660225393
1972	2.4779930675670965
1973	2.446564627592403
1974	0.5037861144363259
1975	0.5506500266062108
1976	0.43064681525447435
1977	0.23766699173087513
1997	3.577898970099189
1998	6.593172279675411
1999	4.10611791079579
2000	2.8845711518786383
2001	3.7921850903614462
2002	3.724295746115093
2003	4.220369678584113
2004	3.0553386170117416
2005	3.512697340531893
2006	4.253603929040112
2010	6.179624450677329
2011	3.6716409655263487
2013	5.456728211692654
2014	7.296126642047879
2015	9.674524608605564
2016	7.345016861683333
2017	5.870512773604552
2018	6.336076445712605
2019	13.560198998169318
2020	17.52567989184339
2021	7.65365819281534