Year	% of merchandise exports
1963	27.45816158500588
1972	27.53801834572022
1973	24.57486135991847
1974	20.436206909065717
1975	21.244526964629596
1976	19.452001215338875
2000	6.535186282543972
2001	6.340197319632931
2002	7.0509306534372636
2006	4.819651388728477
2007	5.743693571539602
2008	6.083946996716609
2009	8.46346954212617
2010	7.2207765238560535
2011	8.698770318365787
2012	10.407150772204991
2013	9.543401784113534
2014	12.063015369618846
2015	14.845242261131453
2016	14.869353672892691