Year	% of merchandise exports
1970	1.3304425759679959
1971	0.8908801580691234
1972	0.6073256769417613
1973	1.510484358263918
1974	0.931131670468141
1975	1.0883208894434593
1976	0.8089187565523153
1977	0.6986690890462965
1978	0.7550532379881705
1979	0.7377358896569155
1980	0.12299973194122424
1981	0.08897613737811846
1982	0.1458267691059822
2002	0.20525552931120128
2003	0.2709821144123737
2004	0.43706484978759025
2005	0.4704770900288538
2006	0.6508017345937173
2007	0.7369797779142292
2008	1.045370137289838
2009	0.6047236269942204
2010	0.9629611311067671
2011	1.3354156381453195
2012	1.4620295790608138
2013	1.6946212530429583
2014	1.6037638245864883
2015	1.7644259568506362
2016	1.047901090703479
2017	2.1697928077733315
2018	2.046983559998572