Year	% of total merchandise exports
2002	75.69124423963135
2003	2.571154484753202
2004	6.029161031700104
2005	13.037792561101808
2006	22.912705597672232
2007	23.219257883532915
2008	15.042815541525915
2009	18.933115622711664
2010	17.901845425658426
2011	17.87226176594794
2012	90.95365482229205
2013	72.54815851624927
2014	1.136162163116459
2015	1.3426537402598309
2016	1.401161533904916
2017	1.7261815537687422
2018	3.8549584166761837
2019	9.450247387291968
2020	12.634980090587531