Year	% of total exports
2005	76.17296243519101
2006	74.84924825019029
2007	77.54377075149279
2008	78.33499304104417
2009	82.1326503276194
2010	79.44461095759749
2011	81.92752184170725
2012	82.80660182772476
2013	84.03469664440999
2014	82.73808094491754
2015	87.12994665777569
2016	101.96699851872266
2017	93.52260890061513