Year	% of merchandise exports
1962	53.75585241758862
1963	61.100605009968135
1964	54.43718346758586
1965	45.76089560551361
1966	51.7149818174326
1967	46.35572631341163
1968	38.09208735245819
1969	38.050799357188026
1970	35.82400386734328
1971	45.65635021873696
1972	33.93794175528275
1973	26.893054387819827
1974	31.475726682624362
1975	33.67265309247948
1976	39.39018431128994
1977	36.83645011945652
2008	9.894828627057475
2009	7.5596728013314545
2010	10.767045824208271
2011	12.87900880172082
2012	0.23660447377448374
2013	0.0369922318818034
2014	0.04752302170832737
2015	14.79906666614608
2016	16.359109382904222
2017	17.063633937242738
2018	16.694599474721603
2019	21.035060334527618