Year	% of merchandise exports
1963	2.976829416970047
1972	5.336790392130807
1973	7.077961867102593
1974	7.265066141391401
1975	6.570054389638903
1976	6.275090450795316
2000	5.8122787698067535
2001	5.003077362937769
2002	4.913394296434939
2006	3.204130083824435
2007	3.666921807653231
2008	3.3627917503953917
2009	2.3930306235318417
2010	3.692028013131259
2011	5.603119284400659
2012	4.6748332419391465
2013	3.259514422549227