Year	% of total merchandise exports
1960	6.4882400648824
1961	7.404637247569186
1962	6.6350710900473935
1963	5.749235474006116
1964	5.340519353258206
1965	6.161616161616162
1966	6.58193372673627
1967	5.116279069767442
1968	6.303618052965311
1969	6.909282216451487
1970	5.749469194379955
1971	6.319545886805031
1972	7.364198562594017
1973	5.554038637766266
1974	3.494499451734763
1981	0.10921856067193604
1982	0.0002863106297441498
1983	0.0005742730168968299
1984	0.04485029507268258
1985	0.054530595413840595
1986	0.6217150690750339
1987	0.8566184445334665
1988	1.0544170525946588
1989	1.572206724202315
1990	0.47379090826740317
1991	0.10476155073813223
1992	0.5277774888424488
1993	0.2495616371971651
1994	1.2102329596158974
1995	0.5521326708157116
1996	1.5041669570589273
1997	1.34918634493662
1998	0.30082334726003224
1999	1.0071742299765643
2000	6.947015753860625
2001	7.17937769282353
2002	6.978273982013785
2003	6.6817800396011275
2004	6.115555707347589
2005	5.001858304584964
2006	4.395224229130211
2007	1.303209898462334
2008	2.209661558899587
2009	3.9464427732884646
2010	3.4434344579534675
2011	2.876845065376012
2012	4.522278446503051
2013	2.7618924568446257
2014	3.47690655400287
2015	5.0384075163847415
2016	5.870710686699179
2017	5.046106598320596
2018	3.3349780712755823
2019	3.8246144973746046
2020	4.438949725311797