Year	% of total merchandise exports
1981	3.9365586486970527
1982	4.697072839175281
1983	27.244755245046154
1984	11.925255432979652
1985	3.5460268245102675
1986	4.946018636962704
1987	3.902439099203889
1988	1.9844620974343945
1989	0.914250448345728
1990	3.8167054428541
1991	3.282497044065017
1992	1.1728344116747424
1993	5.8359822009517845
1994	14.57919632500385
1995	3.095924956582493
1996	7.623292232925566
1997	8.47520341568693
1998	6.876794296769412
1999	2.965712622500836
2000	3.6551608260772985
2001	5.970892669412572
2002	2.356705567732256
2003	1.2302646669709614
2004	1.5048834420221298
2005	8.28291872450614
2006	11.601104305021257
2007	12.910623579160143
2008	14.197763012162302
2009	14.987460845569442
2010	9.833360225676342
2011	19.225945035444983
2012	15.354272317990622
2013	13.710095468214176
2014	15.024324636073711
2015	9.057292294482016
2016	10.591364076662837
2017	15.563109019103017
2018	11.535339026843989
2019	12.097955195809757
2020	13.404993205136694