Year	% of total merchandise exports
1981	0.43670983385648177
1982	-1.1878648304521904E-08
1983	-2.368528506925307E-09
1984	0.3261684004199002
1985	0.43218231340352636
1986	1.4264772672114951
1987	2.0325946760681344
1988	1.049509890593155
1989	2.1533090813720666
1990	3.033559996163592
1991	2.2544873523479647
1992	2.0225659395823037
1993	2.249455801273605
1994	2.20869652994551
1995	1.9718214249665338
1996	5.081921688419883
1997	1.9400352733686066
1998	1.8034265103697025
1999	1.4689661081245344
2000	1.5948990490498112
2001	1.7494502374201928
2002	1.3104001043663065
2003	3.260634700300783
2004	5.067253263616447
2005	3.6504270234139873
2006	2.4166914871541194
2007	1.661796642734583
2008	2.37630659572601
2009	1.7211433312945519
2010	1.947150457782153
2011	2.1341741559375698
2012	2.162516745801989
2013	2.1469859229088457
2014	2.2729509227483495
2015	2.97623560408766
2016	2.278469845965252
2017	2.2825701475160454
2018	2.43059757798077
2019	2.3037328302188214
2020	2.306293110424751