Year	% of merchandise exports
1963	10.694089917489903
1972	13.475915615687894
1973	12.650364145361172
1974	11.041243441508824
1975	8.99002240916966
1976	7.739048331420468
2000	2.42691550610185
2001	2.4274593170743697
2002	2.4004738583932568
2006	1.6289653630939032
2007	2.307782809402618
2008	2.034039459821431
2009	1.8813968378787551
2010	1.8489462242819452
2011	3.330849861701999
2012	3.9382350439968437
2013	2.2031988282759043
2014	1.7197136170087675
2015	1.5106561042155673
2016	1.9049075041939436