Year	% of merchandise exports
1963	29.48590905017759
1964	37.803637421928634
1965	36.030395555986985
1966	36.01392009662144
1967	30.578052474774893
1968	27.538143609834005
1969	28.860263782765838
1970	24.551749916716567
1971	28.783753785422572
1972	28.839788625035904
1973	32.87636933644234
1974	44.63199813791554
1975	42.44947094615165
1976	38.93461970402987
1978	37.44007227434001
1979	28.639822419777968
1980	46.88138088319343
1981	58.771061245506374
1982	60.9700231298883
1984	42.724938297939616
1985	45.19143594168898
1995	44.366094462853006
1996	60.5839060074125
1997	58.01203944972993
1998	64.64081262900838
1999	70.34248034258978
2000	16.73309316948757
2001	10.408599039340565
2002	17.55087376003737
2003	10.432465113597935
2004	10.5260195192051
2005	6.8444143770718915
2006	5.559731896480067
2007	2.4037491818521812
2008	2.5809678653101806
2009	5.824686889401088
2010	3.516083208220445
2011	6.258551709321194
2012	15.916835474811105
2013	2.2055756132113693
2014	20.994811823240326
2015	30.027135282417895
2016	50.846082397064215
2017	42.309401967822055
2018	50.552021443844