Year	% of total merchandise exports
1965	0.07521624670928921
1966	0.3187481889307447
1967	0.7979924717691343
1968	1.0253713684764032
1969	1.2124911469787902
1970	1.0162355924227908
1971	2.864642758819693
1972	6.203993159706611
1973	5.125206359933965
1974	3.959925834925835
1975	2.2263846357648536
1977	0.0005572582892170521
1979	1.3054786633945499
1980	0.7299815156547238
1981	2.646319343012442
1982	1.1685619280437125
1983	1.1685619280514972
1984	0.3402948746302268
1985	0.20565175673193228
1986	0.11603450466133468
1987	0.04112205956099164
1988	0.00023617934069367083
1989	0.01738369683990773
1990	0.014916070986509494
1995	0.03270972152871362
1996	0.218192226574508
1997	0.034741868635715684
1998	0.025992990575118134
1999	0.34915553662377985
2000	0.1044074301634353
2001	0.045657950071920174
2002	0.054574125596359706
2003	0.4343032515328787
2004	0.015092729806602988
2005	0.00807547217005392
2006	0.0018596102375997435
2007	0.0004318452783800652
2008	0.004670333392462023
2009	0.018772693178474447
2010	0.005448056805785648
2011	0.035496530779905784
2012	0.0048601046685986795
2013	0.004700142900342157
2014	0.14310964755161432
2015	0.05722243788402931
2016	0.012375203110643595
2017	0.013305750625567249
2018	0.01093000235300945
2019	0.012831080177128522
2020	0.021558389687002775