Year	% of total merchandise exports
1961	0.7142857142857143
1962	0.9900990099009901
1963	0.8021154693697664
1964	17.682926829268293
1965	1.2903225806451613
1966	2.307692307692308
1967	2.439024390243903
1968	5.533596837944664
1969	1.3749277874061236
1970	1.0762685599977462
1971	0.39600121846528763
1972	4.073417357550199
1973	6.673297247671327
1974	18.395953982798183
1975	18.791395259729597
1976	10.823663011462436
1977	11.091224296515081
1978	9.215505393753412
1979	0.07060684227372861
1980	14.934810396250533
1981	12.068673405997627
1982	11.830478374440718
1983	11.769747463053472
1984	24.32136921607985
1985	9.609023304806742
1986	9.884359133977291
1987	0.5057024234601222
1988	21.881875941005895
1989	27.3145891982471
1990	18.963820800638516
1991	36.814611221886416
1992	35.03381829219821
1993	54.14215212815087
1994	35.391939038809475
1995	48.68165828588841
1996	38.67548265407111
1997	41.70524238878849
1998	34.450391484871304
1999	32.028526965699825
2000	0.08747809393650417
2001	8.657483648234832
2002	7.045982991134039
2003	10.250259000852274
2004	21.04573475843596
2005	15.646545782739778
2006	14.367442828928983
2007	12.124320169699617
2008	13.062182490571425
2009	13.027512465785671
2010	7.15171303321324
2011	10.981175190324972
2012	16.79795907464602
2013	15.685453726446092
2014	16.027451287719426
2015	15.007337688170894
2016	12.51836060832706
2017	14.112865843672884
2018	16.503106687552567
2019	16.750874256122692
2020	9.66000596005852