Year	% of total merchandise exports
1960	3.8397328881469113
1961	0.5661712668082095
1962	0.16790180639184807
1963	0.3434852301351042
1964	0.3958321206123756
1967	0.5933771454093026
1968	0.08487935006669092
1972	1.1512779184895234
1973	4.032841762417443
1974	3.570305127398553
1975	3.350636565010181
1976	1.0751937443273056
1977	2.0902446609993777
1978	1.1122511189424693
1979	0.6233927259368112
1980	2.6752815673830677
1981	1.5186846545861563
1982	2.154569642967638
1983	2.22559874459791
1984	0.882322648570088
1985	0.15213053781631983
1986	0.789291844669778
1987	2.1744023462810764
1988	1.265718040834398
1989	0.8655709181555541
1990	0.49125778933994796
1991	0.3031500055242013
1992	2.382058515439661
1993	0.07749521378992105
1994	0.026721905809889247
1995	0.03888343751690426
1996	0.06967186159237296
1997	0.3691551414682883
1998	0.4777196615850351
1999	0.5411895091752615
2000	0.6807907815275265
2001	0.4903781902377154
2002	0.37427363509253125
2003	0.46452738550419626
2004	0.7509195283943387
2005	1.1254000662910773
2006	1.9983442919907657
2007	3.521769085939721
2008	3.033867121253906
2009	2.7643810044010357
2010	2.8135458098971786
2011	5.826062027742237
2012	5.832756347142832
2013	3.786455765275077
2014	3.659636593661041
2015	8.087857337686872
2016	8.187025233679119
2017	8.126333792007797
2018	9.373211590953892
2019	9.825512171010129
2020	5.592082027369794