Year	% of total merchandise exports
1960	8.160812991382565
1961	6.821161662514751
1962	6.471907212337275
1963	8.793404576537107
1964	10.93701423863707
1965	9.51244298442559
1966	9.21129307746408
1967	6.825761303373244
1968	6.474765096562911
1969	5.437383674554639
1970	7.013123484947985
1971	6.578266951897273
1972	8.512166312308056
1973	7.548968428697882
1974	8.009515337832159
1975	9.425191558794086
1976	8.446718161934225
1977	7.6854375262598404
1978	7.943325087857676
1979	8.94560798641486
1980	9.442945915660154
1981	9.067971631049646
1982	8.697629565371189
1983	7.373486252159695
1984	6.385382184897774
1985	6.362192338535562
1986	5.972060898857868
1987	5.990553248569431
1988	5.882172193910843
1989	5.56111676901003
1990	1.8338140243220107
1991	2.1564797112822203
1992	1.8597295705548238
1993	0.886753804176026
1994	0.8258538371200836
1995	1.0060144962706694
1996	0.7458749801711287
1997	0.3328015844925574
1998	0.23282662632408882
1999	0.16164883318139778
2000	0.15669367971505488
2001	0.22369656736296625
2002	0.15261917577929854
2003	0.10201990162039168
2004	0.14552812843298962
2005	0.17922921561670113
2006	0.20238525347995723
2007	0.20672954540047486
2008	0.20683187486168658
2009	0.2042550136665982
2010	0.17047838061026468
2011	0.18746658079635667
2012	0.2130856904953358
2013	0.19687255004670734
2014	0.15219403704280418
2015	0.14072809916545861
2016	0.06695758444558522
2017	0.04979697174472109
2018	0.043532061938343115
2019	0.01982670130778439
2020	0.03764784489829396