Year	% of total merchandise exports
1974	0.5189783250228961
1975	0.9169964417545143
1976	1.5134429342987714
1977	3.2189729347056577
1979	1.6801211306607937
1980	1.702420288153503
1981	0.9835479671098589
1982	1.0301204658261411
1983	3.177272944056722
1984	3.2358457977265465
1985	3.235845797604283
1986	3.23584579780211
1987	3.235845797563513
1988	0.8541649692690031
1989	0.8541649695540949
1990	0.24247401663966867
1991	2.9460265414238487
1992	3.1023456800564335
1993	3.270110265824918
1994	2.696184609235086
1995	2.388130471446037
1996	1.7783438640958702
1997	1.6084774439191283
1998	0.9174866374417463
1999	1.0275550747933986
2000	6.149847270336963
2001	7.544619572528205
2002	8.16720654420976
2003	6.7045237135909
2004	3.8757529996318265
2005	6.420285208581005
2006	7.2006108619557345
2007	8.627240134763404
2008	9.90622880033219
2009	10.072616824876196
2010	10.103683615742025
2011	6.622664687747346
2012	8.421501490579997
2013	6.1396296036678875
2014	9.846705180615656
2015	6.5067210318271185
2016	8.8877433518119
2017	7.023252601976895
2018	11.403567780318744
2019	8.616729023894822
2020	5.943079470868871