Year	% of total merchandise exports
1963	7.142857142857142
1964	3.0501089324618738
1966	2.3289665211062593
1967	2.9243809023408875
1968	4.098497728476268
1969	5.7212267667549295
1970	2.487678167044092
1971	4.61442550680753
1972	2.9936758597462862
1973	1.3331078972011234
1974	0.9535890577172323
1981	0.9535890576778453
1982	0.9535890577258941
1983	0.9535890577981158
1984	0.9535890578845362
1985	3.6922870915907873
1986	8.334559434253304
1987	7.108916121100497
1988	8.160393264556832
1989	8.906644451980556
1990	5.300182866106714
1991	7.720531352835855
1992	9.985127556095884
1993	12.431872814443883
1994	6.461072881304276
1995	11.091504283500527
1996	10.983041442371748
1997	9.620168964942168
1998	9.693507415290066
1999	11.354213565109578
2000	11.748663134158663
2001	7.015244111880964
2002	4.630254979543407
2003	4.964339600516005
2004	2.390866767360296
2005	8.093078859113986
2006	9.182545306602787
2007	23.2861028127581
2008	2.520450359686849
2009	2.1726668099746687
2010	1.505816859448386
2011	3.456453367782257
2012	5.604300906610369
2013	3.996165777030717
2014	9.469987541038304
2015	8.699454135049528
2016	10.086355881229798
2017	6.690248318201222
2018	11.206960011214036
2019	8.90284936901698
2020	7.818468025530619