Year	% of total merchandise exports
1964	0.01663616702711695
1965	1.6402186958261102
1966	2.3276633840644583
1967	1.5641139147115242
1968	2.6178010471204187
1969	2.7730998091388797
1970	2.009198741224885
1971	1.6241299303944314
1972	0.9819666865507273
1973	0.1849016265564961
1974	0.0010846928149947934
1976	0.8764681305417577
1977	0.607316557411715
1978	0.6950792008598089
1979	0.4291097859096373
1981	2.9807026945469115
1982	1.568968196781531
1983	0.7799844564922236
1984	0.8759136324012605
1985	4.47024643809463
1986	1.812184399373028
1987	1.812184399058374
1988	2.0904410460891683
1989	1.0315158720381508
1990	0.1026307951635329
1991	1.6312891058859251
1992	0.27681560444138126
1993	1.1227697138540902
1994	3.5130355814839547
1995	2.581966479737471
1996	1.7292905158080665
1997	3.5724790376300106
1998	5.603463115157769
1999	5.820634463249213
2000	3.3058229312692076
2001	6.241608590256334
2002	8.670919689304435
2003	7.38352419390437
2004	11.520811959480989
2005	6.948976544041978
2006	8.400391504500801
2007	5.5307790842652516
2008	8.53930155180993
2009	10.19067473835672
2010	8.408939750046201
2011	8.586484281084527
2012	8.379511558419136
2013	11.078499925574397
2014	10.812310520418064
2015	9.194283857461246
2016	4.439774870049921
2017	2.7621514855217004
2018	3.7288873146383255
2019	2.662164110311537
2020	3.2243045995935935