Year	% of total merchandise exports
1968	0.03706199460916442
1972	0.05758245807997052
1973	0.0021458306510450196
1976	0.023334995067830586
1977	0.04675081813931744
1978	0.01595375288575236
1980	0.16366488671674662
1981	0.16366488666150722
1982	0.048668148452904784
1983	0.0287569573283859
1984	0.01728717134729927
1985	0.019311587872322816
1986	0.09080505522937606
1987	0.04303845737759589
1988	0.03888353184915654
1989	0.5591499007595834
1990	1.0738056931056255
1991	0.793516693220218
1992	1.8780264401709958
1993	1.2465465681383994
1994	1.7556089342047154
1995	1.281864375532745
1996	5.855424336048481
1997	0.900033068243956
1998	3.026607344729173
1999	0.9673808685281591
2000	2.1277269321699728
2001	6.515347109145864
2002	18.300994148650062
2003	8.16566106151005
2004	5.548154842484563
2005	6.611940448830529
2006	5.856412117631235
2007	8.58824758275817
2008	9.908725755315455
2009	3.006303328301773
2010	3.359601828357297
2011	2.488805466136951
2012	2.7522139662589984
2013	6.841863996393931
2014	8.226181099208219
2015	3.26846122441166
2016	3.6811987951353804
2017	2.3347113036858174
2018	3.099787838459609
2019	3.696902788652069
2020	1.802824584207384