Year	% of merchandise exports
1999	53.379835863914536
2000	39.860264664652995
2001	28.707385393567264
2002	31.14537778181921
2003	46.09281030432773
2004	28.25765645133491
2005	38.94231605579348
2006	54.234293863015594
2007	56.64638694670241
2008	67.16389197672243
2009	70.60338727710186
2011	79.25059515780106
2012	80.03749198453932