Year	% of total exports
2000	12.202763772375688
2001	12.262982153742879
2002	15.122726567982458
2003	17.00979570829712
2004	16.924349831054414
2005	20.16374053890331
2006	19.0155968059703
2007	18.509097238215325
2008	16.22494325187911
2009	16.881315889989615
2010	15.066310689965151
2011	14.203822133452046
2012	14.062027914366743
2013	13.965211244964692
2014	15.169108076519425
2015	19.074852834826455
2016	19.629520952225928
2017	18.982838357900807
2018	18.83041920938369