Year	% of total merchandise exports
1974	2.0231115930732995
1976	1.6963987332707395
1977	1.1358529570375695
1978	5.993195121247945
1980	1.182565426888798
1984	0.14067829202384446
1987	0.582923762715739
1988	0.08891523414344991
1998	0.15959601609777432
1999	0.01808055533134511
2000	0.0026856990335507726
2002	0.009851986933643767
2003	0.0052218843067795995
2004	0.001985526080919201
2007	0.005723092282970693
2008	3.1621671821639725
2009	2.1400677968918433
2010	2.539146221019742
2011	3.2817259076278944
2012	5.596427144372846
2013	0.5829408164253831
2014	1.1009120082625008
2015	0.9712398018959156
2016	1.1144279504704468
2017	1.529517951969654
2018	3.3981390546484946
2019	3.9493156220227754
2020	2.046443030735159