Year	% of total merchandise exports
1960	2.1671826625387
1961	2.96220633299285
1963	2.803738317757009
1964	1.04
1965	1.6033755274261603
1966	3.50609756097561
1967	2.2239872915011913
1968	1.7628205128205128
1969	0.8033007891324695
1970	0.7419025890974454
1971	0.35794336388629805
1972	0.8431930768494094
1973	1.006981849362462
1974	0.5466455459522599
1975	0.8790497242503406
1976	1.3070926647176644
1977	0.17844900449115667
1978	0.09291221488426096
1979	0.17791124068331357
1980	0.22487313828902633
1981	0.3515440453971442
1982	0.41154898073102464
1983	0.32970744735656154
1984	0.12745394961637624
1985	0.4530590315829768
1986	1.331857567516286
1987	0.5569127726088022
1988	0.2081724117526683
1989	0.672912745309198
1990	0.5024014098330956
1991	2.566283745671464
1992	2.5736350716536247
1993	1.5215650681989685
1994	2.0063930108791226
1995	0.42314827173018515
1996	0.6923638839700761
1997	0.7494638412736245
1998	0.7853304890389665
1999	0.9234981105720861
2000	0.8025640423414862
2001	1.0797040944555303
2002	1.215895519596618
2003	1.2857951550360005
2004	1.4590524128688844
2005	0.9110144293989307
2006	0.9454466873021462
2007	1.8987148968914487
2008	1.1292641830505223
2009	0.8663080120867755
2010	0.6430085263671348
2011	0.5176404826364492
2012	0.33717406142712414
2013	0.24859214546107178
2014	0.2312319171391491
2015	0.3493948628211712
2016	0.5677079226487994
2017	0.47729032637840163
2018	0.3439926553627714
2019	0.4576235635763295
2020	0.45747505477054656