Year	% of total merchandise exports
1974	1.677481976657717
1975	0.8188952811679027
1976	2.2467538462553005
1977	3.1340194957250995
1979	3.872375569824215
1980	3.8820214354002784
1981	5.339658241449654
1982	4.070766656598892
1983	4.4191850945105955
1984	4.884600111703347
1985	4.884600111303906
1986	4.884600111611467
1987	4.884600111531224
1988	0.02874374926848192
1989	0.028743749272029332
1990	0.06542577431573264
1991	0.31333710774261875
1992	0.20559269523955634
1993	0.3346753402569726
1994	0.07393095976981923
1995	0.1507540878866932
1996	0.1876074212573104
1997	0.26672126058716356
1998	0.8149941005272502
1999	0.796072249395113
2000	0.8970888323021892
2001	0.3039336405436523
2002	0.3997525393411054
2003	0.8123195278406561
2004	0.3629490221127292
2005	0.2118172810666234
2006	0.3439865291931591
2007	0.3786946966902556
2008	0.5423250202557957
2009	0.3886911196882849
2010	0.7729585418652247
2011	1.1221013405012659
2012	0.523419029657756
2013	0.593496263518229
2014	5.988301659644715
2015	0.4385690667115922
2016	0.6551890069452617
2017	1.1235558181393797
2018	1.3361011819130348
2019	1.4043638323564727
2020	0.8890805490287096