Year	% of total merchandise exports
1961	3.608247422680412
1962	1.1363636363636365
1963	0.48192771084337355
1964	0.6342494714587738
1965	1.502145922746781
1966	1.8604651162790697
1967	1.4644351464435146
1970	2.8799739073711677
1971	8.218028283650423
1972	1.3454061108345554
1973	4.94141499870335
1974	1.8965449039420883
1975	7.119717520457349
1976	1.8300278913889472
1977	3.3831088781894723
1978	3.82542597258402
1979	21.364035122029836
1980	19.0959370638938
1981	14.086526271688152
1982	0.9680152470569147
1983	0.41027342071747974
1984	0.5013252713734009
1985	1.7280347625551955
1986	2.1367139758129703
1987	1.5673449768907874
1988	4.284052133419433
1989	1.7591917987752579
1990	0.6188779104079445
1991	0.022092300994220066
1992	2.456398918911273
1993	0.2981283981837325
1994	2.3869008276402504
1995	1.084572788261182
1996	3.3625172883106424
1997	10.035075559268316
1998	5.588104480319757
1999	7.017258947353404
2000	16.769924162718393
2001	25.302344076778194
2002	21.06333949838896
2003	34.27663003282437
2004	41.84658111947384
2005	43.13424611726775
2006	45.300987438432145
2007	56.10790627032828
2008	42.00609315370599
2009	28.401642188601855
2010	25.97853206268702
2011	33.24238230179692
2012	28.393018415965717
2013	45.85089196864347
2014	26.970554344539178
2015	20.647294569284536
2016	13.715453862248882
2017	41.86946316767256
2018	65.06767659213925
2019	75.10070528429831
2020	68.63474303498874