Year	% of total merchandise exports
1969	14.529914529914532
1970	36.62551440329218
1971	8.64864864864865
1972	9.230769230769232
1973	13.758389261744966
1974	15.378359144667728
1975	6.394711282388696
1976	17.460494279030538
1977	30.466924321409312
1978	22.816527781782533
1979	25.80334993557816
1980	29.67436147765565
1981	24.192576608891816
1982	15.088372305443917
1983	21.597759713741198
1984	34.69693442772273
1985	16.33359883299475
1986	31.949142519219397
1987	30.9406789347354
1988	3.5566093657379962
1989	27.15857742451765
1990	34.9510310091482
1991	25.888306628322276
1992	35.79727512043379
1993	15.345793017700284
1994	39.229872787687704
1995	39.29082764673778
1996	49.099956612177195
1997	34.590205494656864
1998	44.358263380892204
1999	28.78036966649511
2000	17.049127353330327
2001	2.7181509326091495
2002	12.709993374926384
2003	29.655420061597894
2004	21.060004884132905
2005	24.303154937722717
2006	19.16334395812555
2007	21.260870448733417
2008	17.282620840900073
2009	12.067424257341575
2010	1.7139609833665452
2011	2.09254461236358
2012	5.3670374026893715
2013	0
2014	0
2015	0
2016	0
2017	0
2018	0.012383665218377042
2019	0
2020	0