Year	% of merchandise exports
1963	0.0004315109901794472
1972	1.0049195754290352
1973	1.8907465066274844
1974	2.789455875566155
1975	2.121834959416688
1976	1.5420655751507728
2000	0.010575299313052013
2001	0.017173385826771654
2002	0.02623296603773585
2004	0.023527193077339102
2005	0.03433026854802003
2006	0.0072002041149727795
2007	8.887921093463098E-05
2008	0.15213024660465474
2009	0.048157713833430746
2010	0.000470060145031071
2011	0.003384618316769538
2012	0.004312731854746568
2013	0.00039000741894287024