Year	% of total merchandise exports
1960	0.6729475100942126
1961	1.611047180667434
1966	0.458295142071494
1969	0.010827107746379166
1970	0.22863054054256654
1971	0.04759255411139339
1972	0.011971915295178135
1973	0.4886052606741736
1974	12.889613539187081
1975	4.033960330013723
1976	8.799720223085277
1977	0.2649528414840449
1978	0.3819216941706867
1979	0.5000481145952188
1980	0.7465954936341012
1981	0.5221185240833309
1982	0.8274611740186488
1983	0.17700534759358288
1984	0.9503628074231042
1985	0.39607641272020133
1986	0.3960764126528696
1987	0.3960764126399526
1988	0.37259176337624755
1989	0.39607641263984594
1990	0.26718177701644696
1991	0.905612795801431
1992	0.44260864038581543
1993	0.4624603034611088
1994	0.6063369899980109
1995	0.40636845053486464
1996	0.7187060962851282
1997	1.392968221407687
1998	2.248161820992176
1999	1.6499421526108198
2000	1.7104519753604202
2001	1.6487477677756415
2002	1.7418660382353537
2003	1.6249173075933563
2004	3.291002744241906
2005	4.1729813314562
2006	4.979354434807319
2007	5.8335494102507415
2008	5.564332839434897
2009	6.176610260932675
2010	4.393477806271108
2011	4.144496570309764
2012	3.7694888171253624
2013	3.877584875609542
2014	5.154203835622379
2015	5.526067565095477
2016	5.218542406905933
2017	5.490012673036645
2018	7.444331487112453
2019	13.992440742475253
2020	13.338849780915444