Year	% of total merchandise exports
1981	2.0046962231191494
1982	5.957612979160261
1983	6.077336371451337
1984	3.893122542001031
1985	5.1132911356780575
1986	6.837178668724405
1987	10.527419693404346
1988	10.058296511201913
1989	14.606298658963683
1990	11.740961346355313
1991	7.0961739103233406
1992	13.002215953399924
1993	2.963413364718511
1994	0.3406289683932712
1995	1.1090444582125845
1996	0.16090031450306716
1997	0.01495412476635541
1998	0.2941743827186419
1999	0.058027589486337836
2000	0.014209607889913663
2001	0.06264604068133538
2002	0.04041097092727386
2003	0.5941853017704306
2004	0.15714460137166195
2005	0.9394007505580141
2006	1.3670418006643508
2007	3.914698979140706
2008	2.9082032966358513
2009	5.6808304657414075
2010	6.8855662222171725
2011	3.2507946776047416
2012	4.397311071577744
2013	5.469354063539386
2014	4.743359037576801
2015	3.8555563013638854
2016	4.1934592653314855
2017	4.087910366592894
2018	2.6701863245889856
2019	2.7300713978319306
2020	3.057874075551679