Year	% of total merchandise exports
1960	4.895474993384493
1961	5.669393374908885
1962	9.038088833018442
1963	7.58461114370078
1964	7.511159519314001
1965	8.215981751918738
1966	4.213211873625557
1967	4.463856627547852
1968	5.924207167886278
1969	4.863367469867026
1970	4.685725336842847
1971	4.27283592494817
1972	5.12588095600989
1973	5.911997067440565
1974	2.9660409736689477
1975	2.8719623374507353
1976	3.118765339443953
1977	3.0867850544676174
1978	6.34965767488525
1979	5.395832715018253
1980	5.030284462455023
1981	3.364773339931065
1982	3.039675191104881
1983	2.9473369674485235
1984	3.0547366497488215
1985	4.352466675887566
1986	4.784124399917846
1987	4.085498148747259
1988	4.114939847454123
1989	5.7665613702507414
1990	4.274365325998239
1991	2.996231746824157
1992	2.339086248553863
1993	2.0198693607566076
1994	1.92469899856176
1995	3.046797022237639
1996	2.357230941807543
1997	1.2544215706029644
1998	1.2241672986258785
1999	0.7550711186197658
2000	0.25202556529310527
2001	0.25568120951498524
2002	0.2950691036218792
2003	0.14700769549401052
2004	0.18329430423573756
2005	0.21827341336677522
2006	0.2627757404717843
2007	0.31814410446876107
2008	0.3489570897123277
2009	0.4927832783160913
2010	0.4041124114112329
2011	0.4830299531982604
2012	0.5010034109756549
2013	0.33878751152101005
2014	0.296441487085506
2015	0.37099785809822916
2016	0.37897980119118035
2017	0.2667706251631117
2018	0.07379050508959178
2019	0.09818138455233157
2020	0.07289997051307372