Year	% of merchandise exports
1962	3.1392646786403064
1963	0.8338989402236426
1964	0.5396966042432669
1965	0.27257814615888787
1966	0.11721216914251016
1967	0.10902657657621845
1968	0.04478325383217735
1969	0.026675906927201606
1970	0.005555175797874353
1971	0.027130764896835878
1972	0.04793945975375638
1973	0.006114661575158086
1974	0.000578780813042874
1975	0.00010090799023087037
1976	0
1977	6.864510352782975E-05
1978	0
2007	0.0018616095053299178
2008	0.0025771584775500594
2009	0.005876318966475799
2010	0.0019422748742258362
2016	0.2420082174298039
2017	0.2420082174298039
2018	0.1515450863431139
2019	0.10197887970716084