Year	% of total merchandise exports
1960	0.0765696784073507
1962	0.09557945041816009
1963	0.08705114254624592
1964	0.16363264471262018
1965	0.5346572465151804
1966	2.248322147651007
1967	1.1890805560207671
1968	1.2002182214948172
1969	1.6960228116553302
1970	1.832200298457967
1971	1.3938592006736235
1972	1.1499330064637718
1973	0.10507512871703267
1974	0.08963866653519663
1975	0.5565439098874544
1976	0.7668711656441718
1977	1.4860892164799113
1978	2.2015996993853504
1979	0.7724561966747413
1980	1.2201174305762346
1981	1.102480755154219
1982	0.7665627094931359
1983	0.7867076010459081
1984	1.3076799818660039
1985	2.043879317270543
1986	0.7868662504729473
1987	0.9754014595038071
1988	0.5790217171952374
1989	0.7573088962491992
1990	2.5217899521484917
1991	1.55201892857925
1992	1.1754784696972438
1993	2.463033697466151
1994	1.105129254530416
1995	2.692170799353335
1996	2.150068786463262
1997	2.2235484112654444
1998	1.5654108245923752
1999	0.8474974525718895
2000	1.5349214829478324
2001	1.3174060220522905
2002	1.4657309798227252
2003	2.0778910428590263
2004	2.176992327458451
2005	2.541592582326593
2006	2.712216505745775
2007	3.359654318329984
2008	3.392044662726073
2009	3.1330675081054014
2010	4.139434529465421
2011	4.276990953998188
2012	2.9829192531953126
2013	3.151521579335033
2014	2.9653909870328765
2015	2.4060304445694256
2016	2.629449494121317
2017	2.9983178835812385
2018	2.9251195238272745
2019	2.870822736014702
2020	3.1608256158974064