Year	% of total merchandise exports
1981	1.103554398812637
1982	1.4336960139392163
1983	0.968525388294302
1984	2.4448132140358707
1985	5.8073114948070215
1986	4.771720235356375
1987	3.359155816548909
1988	5.495084651469498
1989	5.380856558756834
1990	3.6118554973903225
1991	2.5956556846065717
1992	2.354398334010561
1993	1.2193986009704187
1994	1.0814865584046434
1995	0.8028239653898074
1996	0.8157620001734154
1997	0.006680854507018502
1998	0.020099639968266553
1999	0.0026167212872237945
2000	0.2219937328958599
2001	0.2681143176706548
2002	0.15685356341789905
2003	0.13186984484748215
2004	0.2672937135770347
2005	0.4799187191404822
2006	0.1532824862843362
2007	9.790638356878716
2008	7.380181174513965
2009	4.412501828500264
2010	2.1030470883519623
2011	0.94148138171371
2012	1.2506211236068967
2013	0.8469598195205019
2014	0.5393505898064491
2015	0.8713250331348552
2016	0.4839472813146307
2017	0.579021505208631
2018	1.8462405505165924
2019	0.9788450111843041
2020	2.0289274437191356