Year	% of total merchandise exports
1960	3.7065637065637063
1961	1.4916810097532989
1962	0.7175472928897586
1963	0.24198427102238357
1964	0.2788622420524261
1965	0.4704652378463147
1966	0.21482277121374865
1967	0.4410838059231254
1969	0.020967500374419648
1970	0.02840676769720107
1971	0.029655413814561292
1973	0.029549356757160274
1974	0.05442561353104484
1975	0.10914613338751566
1976	0.1262315835825551
1977	0.09069555756369675
1978	0.16524601406808195
1979	0.02700102299650508
1980	0.0862159326665842
1981	0.08616512756074894
1982	0.9359845468583199
1983	1.323151674302284
1984	4.124868968414856
1985	5.18640083955213
1986	5.791995853078391
1987	3.858377042824789
1988	9.895632032911
1989	4.7818133336640605
1990	4.130327616368278
1991	6.529764971287425
1992	5.859664326133974
1993	5.385345916328202
1994	5.760965722434225
1995	6.855581601188698
1996	5.5839210973021745
1997	5.737756869170058
1998	3.8479213845571234
1999	4.557866312211517
2000	5.583225696122016
2001	7.686572019547899
2002	8.45677691320536
2003	7.1801391857351335
2004	5.956563992728103
2005	5.437323736248408
2006	6.530855478825741
2007	5.8093955824633605
2008	4.6015645509624
2009	5.807196903006605
2010	6.88713225430895
2011	8.192634582148294
2012	10.598960947760618
2013	15.552197525660794
2014	15.184206129198676
2015	15.764800921165929
2016	14.32490254841209
2017	20.21051990354919
2018	21.55544809608995
2019	26.44224387405089
2020	20.883474001195815