Year	% of total merchandise exports
1981	0.3788596324381778
1982	0.5100326210050357
1983	0.30637148097214373
1984	0.3896030528677609
1985	1.4575570378156921
1986	0.020214400548085265
1988	0.7150973256123548
1990	31.444041770486468
1991	45.16427446086918
1992	20.43724863227614
1993	39.04842910640433
1994	35.36788906089762
1995	8.5958750043194
1996	23.79899973406837
1997	22.45553521671864
1998	22.41821691521365
1999	19.669488309051903
2000	0.0424518790262954
2001	0.5703928629756719
2002	9.032664635930821
2003	5.4591092550544476
2004	1.7467917433384734
2005	2.150087021200937
2006	10.537631671916541
2007	9.001566142582355
2008	12.621733977429244
2009	7.406764799369095
2010	27.387934258017772
2011	16.17508162178034
2012	10.719795852169968
2013	9.384185440837484
2014	6.2404064175910126
2015	9.562916402215613
2016	7.300195743101718
2017	7.138764631432355
2018	10.031080509655911
2019	9.035842161439653
2020	7.910811968647831