Year	% of merchandise exports
1963	14.204640428877507
1972	14.962750338995194
1973	14.269999462105426
1974	12.395511483223455
1975	9.803358062490906
1976	9.594394480400299
2000	4.888280934724298
2001	4.418896523491603
2002	4.027758222381963
2006	3.0534855830219354
2007	3.0954639229550613
2008	3.701569933846235
2009	2.656864393269434
2010	2.5857081191302997
2011	4.811096207399854
2012	4.921985115206335
2013	3.026484169451405
2014	2.0367227276312674
2015	2.082510640741003
2016	2.622975415380345
2017	3.575374315040388
2018	3.5519969187461986
2019	3.7560179984589324