Year	% of total merchandise exports
1960	0.8411929645679326
1961	1.646542261251372
1966	1.0141661300708307
1967	1.6869469026548671
1968	1.9383578136287025
1969	1.6564483166612884
1970	1.5092453773113443
1971	1.9321687920132329
1972	1.9315901655983323
1973	1.6762294647307745
1974	5.470612719724218
1975	0.20534274150647097
1976	0.2526308682287144
1977	0.006905874654922076
1978	0.006383260537566286
1979	0.037107895769395716
1980	0.05473313595262863
1981	0.07415758562155113
1982	0.23667030327957422
1983	0.12676647157434737
1984	0.6238403418269911
1985	0.9895129702106283
1986	0.5085038195524677
1987	0.888919442622225
1988	1.6698795378714306
1989	1.5146091405290074
1990	2.3628833488148335
1991	1.9554128856096247
1992	1.9715444343896926
1993	1.5975630608790221
1994	2.6596799626804697
1995	2.21740585486212
1996	2.0023526032611016
1997	1.240786534805153
1998	1.1705158141282763
1999	1.7757457654409867
2000	1.3536513101865562
2001	2.4019291569563292
2002	2.5116970065662447
2003	2.5636901221547905
2004	3.170508598758133
2005	2.2252343591024597
2006	1.8145013041653322
2007	1.6874735277602995
2008	2.914424445334542
2009	2.9808622147703243
2010	3.2289313183377875
2011	3.1930547330065457
2012	4.079808585022135
2013	5.302122658058078
2014	5.353731684292225
2015	5.981294109914803
2016	5.647988892420166
2017	5.317228423895758
2018	5.157085122887457
2019	4.386163720618718
2020	4.386163725107348