Year	% of merchandise exports
1992	62.099318798789064
1996	49.044601397727554
1997	61.216776950252985
1998	53.4560959526852
1999	58.797182530683266
2000	61.41511135817308
2001	62.7258285634736
2002	57.30236321156732
2004	61.71350263966339
2005	64.15482571405153
2006	63.68279188816347
2007	65.9336318527895