Year	% of merchandise exports
1963	71.94951395760154
1966	52.46388457298154
1968	55.03474678440769
1969	54.69384784284094
1970	55.37861332659096
1971	55.348819021171956
1972	39.29259761588524
1973	46.72423221703793
1974	54.5303085384548
1975	58.37063036162976
1976	59.98436076251552
1977	67.5888874093849
1997	60.38895936040621
1998	56.33068664907774
1999	59.39749566484562
2000	70.60972889644262
2001	68.91666827810639
2002	63.665183434267355
2003	58.416566674289626
2004	67.61054121074903
2005	69.97389226942482
2006	70.81706142667294
2007	67.4795132037653
2008	66.5861934214906
2009	64.40204330709383
2010	66.34490054639433
2011	65.00003377931392
2013	65.49134666704563
2014	63.34027459019499
2015	58.37606479112122
2016	62.51090625803536
2017	53.04031605222886