Year	% of total merchandise exports
1964	0.1212856276531231
1965	0.10758472296933834
1966	0.3978779840848806
1967	0.6588950836289914
1968	0.5183832427556162
1969	0.2905349053020662
1970	0.23274979224925954
1971	0.05554887239327186
1972	0.31426795054610246
1973	0.18811773247385258
1974	0.11625752177424713
1975	0.34646355435782406
1976	0.3593663740844148
1977	0.3430939487331657
1978	0.5037690446742241
1979	5.666536427388917
1980	4.23139731205542
1981	3.9361553592118383
1982	1.46400447965894
1983	0.08728108456616038
1984	0.08280306056622999
1985	0.01320851879745575
1986	0.07388332013623092
1987	0.4195123581501678
1988	0.4212241797203773
1989	0.019228436925990123
1990	0.8007728398813363
1991	0.18369240748286947
1992	0.19234898287114113
1993	0.2602893794498261
1994	0.4655999714124437
1995	1.7669687511576357
1996	0.03906469094107397
1997	0.03021476762414217
1998	0.018911171300503227
1999	0.21601769626504244
2000	0.1750151442478746
2001	0.27766930508591553
2002	0.3688865691039839
2003	0.5213049248538626
2004	0.6226050145239043
2005	1.4037017269959344
2006	1.245394453109557
2007	1.4667232500869802
2008	0.8259679417356475
2009	1.4982763435175017
2010	1.2113710977718457
2011	0.7909098506421636
2012	0.45240334072943905
2013	1.8496854880931557
2014	0.6972106560245114
2015	2.5761164240880507
2016	1.427676817626102
2017	1.8346783451328297
2018	0.6199141330002221
2019	2.1048784711066784
2020	2.618092353675279