Year	% of total merchandise exports
1960	6.474820143884892
1963	1.3636363636363635
1964	0.34602076124567477
1965	0.7662835249042145
1966	0.3236245954692557
1967	0.34602076124567477
1968	0.2840909090909091
1969	0.3230700078660524
1970	0.486179060665362
1971	0.2404174521214108
1972	1.0061880565477688
1973	0.14376996805111822
1974	0.20227455675039732
1975	0.6549801810204126
1976	0.2392753375491369
1977	0.3714363023639092
1978	0.20220331892344162
1979	0.21997636825301053
1980	0.3275975033621849
1981	0.3139239320143843
1982	2.0826538694497505
1985	1.2390607399705398
1986	0.4819822221395039
1987	0.6970304510804177
1988	0.640569547477464
1989	1.3047180476012306
1990	59.37072600437436
1991	3.3274966779127233
1992	3.6465927798456437
1993	2.4102135712360546
1994	0.3659630353713949
1995	0.2788258287366786
1996	0.1307871687527409
1997	0.29202432115845545
1998	5.830017695467444
1999	0.4315182206242084
2000	0.11305662833614469
2001	0.3072558953083675
2002	0.40648125088628906
2003	0.15697622426383787
2004	0.018630055279618245
2005	0.18886125921468142
2006	0.32867526184392093
2007	0.22071178154962043
2008	4.966653493586259
2009	3.7263452536041837
2010	9.44140385535827
2011	5.6380528833571635
2012	10.284216007684735
2013	11.776343751858352
2014	1.0705671205809508
2015	0.13050107342500017
2016	0.6268953273014823
2017	2.322495124933279
2018	19.972937331661598
2019	13.494647256256776
2020	18.444178044536528