Year	% of total merchandise exports
1969	25.925925925925924
1970	8.695652173913043
1971	14.035087719298245
1972	6.666666666666667
1973	10.204081632653061
1974	5.681818181818182
1975	5.319148936170213
1976	2.877697841726619
1977	6.666666666666667
1978	6.451612903225806
1981	18.46921797043969
1982	0.7539769012397483
1983	0.039759455300905466
1984	2.2677595626435747
1985	1.4619264205870106
1987	0.0007729809218582817
1988	0.006237708964237349
1989	0.061670022511361944
1990	0.171877741594951
1991	1.0194913199570816
1992	0.11348875195733878
1993	0.0452345954681259
1994	0.030246344224429504
1995	0.8306737102696259
1996	0.09850389099603199
1997	5.929304447002998
1998	10.650224214117781
1999	0.46493426202023946
2000	1.5034665749295915
2001	0.7912386581187403
2002	1.4873202190081423
2003	2.145140673403738
2004	0.2720078871321314
2005	1.7019108949307904
2006	2.1876795297715654
2008	5.761745977130463
2009	3.9740564482334326
2010	13.107791189859425
2011	10.213234434127772
2012	3.7288900121167803
2013	10.768507873007602
2014	25.31032364371676
2015	7.863325005814782
2016	4.599037637085316
2017	8.443822540982891
2018	2.7080063991765626
2019	12.074171892089371
2020	3.496320400665725