Year	% of merchandise exports
1963	5.829268898437016
1964	4.995013145111947
1965	4.6530525292102105
1966	4.931157984053609
1967	3.3266872984414686
1968	3.466203724998108
1969	3.678422366187367
1970	3.568060334363099
1971	3.8035611255426574
1972	3.372663452814309
1973	3.418766812770352
1974	0.6450403593481124
1975	0.9720235580385119
1976	0.8054262505506704
1977	0.22862678430270858
1997	0.966029133482687
1998	0.8974494808610509
1999	0.6202173602808821
2000	0.4045219015699418
2001	0.5349090737951807
2002	0.4043717767686085
2003	0.41668484373150233
2004	0.30024077709061575
2005	0.28507992568153034
2006	0.34940067987414425
2010	0.3150306821030017
2011	0.20309603275679539
2013	0.4611683266831258
2014	0.5318124815032693
2015	0.584978582278273
2016	0.4106995531909121
2017	0.3283221027805828
2018	0.3443777532333058
2019	0.5202662653266317
2020	0.6702200544304007
2021	0.415666853223377