Year	% of total merchandise exports
1961	1.2
1962	1.1494252873563218
1963	1.2254901960784315
1964	1.1363636363636365
1965	1.3333333333333335
1966	3.0303030303030303
1967	1.7347034976902047
1968	1.639344262295082
1970	2.432539333743518
1971	3.4929057561425774
1972	5.240486552840085
1973	7.46053983375362
1974	7.022140395600246
1975	6.2899165977909695
1976	7.970955750367685
1977	5.222479734052036
1978	5.052535896961854
1979	3.8770701271116126
1980	4.709947008427294
1981	14.569717902051622
1982	6.162608837741311
1983	5.6121621790155025
1984	7.984788921898149
1985	12.504409273062667
1986	6.437245185515923
1987	12.550230641014046
1988	14.074458874458875
1989	17.885628954380106
1990	13.645835943067377
1991	18.81359242261498
1992	19.78695321884193
1993	27.866933138450978
1994	27.483490787189872
1995	23.427445220160813
1996	25.388256278815437
1997	24.410189470228808
1998	27.464089342391794
1999	26.9781010297966
2000	21.43196663048252
2001	27.24587912146175
2002	26.952238319220417
2003	32.283056405871996
2004	31.17189854854535
2005	32.92078198898798
2006	26.525308740029352
2007	27.869422405225684
2008	27.21190958569803
2009	29.830384540246463
2010	29.44504221710894
2011	26.51959925967956
2012	21.13533582813388
2013	30.087637532900054
2014	30.582377848226066
2015	25.00600615027131
2016	24.24048167516198
2017	22.773725854874836
2018	25.093018760919545
2019	30.737235548415185
2020	33.282360265668366