Year	% of total merchandise exports
1997	0.3012247763768669
1998	0.37587647900789417
1999	0.3631261421572318
2000	0.4273853904513517
2001	0.4429378910707378
2002	0.3778820238543034
2003	0.3634836157285676
2004	0.5025170592936273
2005	0.39106691642211255
2006	0.2258680922788095
2007	0.30363380906030113
2008	0.4319858063433267
2009	0.36876085717618784
2010	0.4850685471980181
2011	0.39820658881238163
2012	0.49533622582560116
2013	0.5243165335719133
2014	0.49745805448966374
2015	0.5054309088218029
2016	0.46374078008538255
2017	0.4898158162469539
2018	0.46401150302386757
2019	0.41831528827133146
2020	0.4950445332355875