Year	% of total merchandise exports
1964	0.2540618132391611
1965	0.29186854240849924
1969	0.061187808329190414
1970	0.043986781408253725
1971	0.04292837565630882
1972	0.04022185528599856
1973	0.08109554225328564
1974	0.05247551991522402
1975	0.02458625194641161
1976	0.040127122724792144
1977	0.07818781302785995
1978	0.03563791874554526
1979	1.3810321012480293
1980	1.0284909799561248
1981	0.09957247780173202
1982	0.04891788489364222
1983	0.04786864544169846
1984	0.08116941947143096
1985	0.03597229528707774
1986	0.02373599915989504
1987	0.29232832372692436
1988	0.2732867736394587
1989	0.03620714667638656
1990	0.02854721160398149
1991	0.11128355162831693
1992	0.6467086314110074
1993	0.5087707145052411
1994	0.8799707735356427
1995	0.7240030317387047
1996	0.6647227961166167
1997	0.7896360522034284
1998	2.547057862254753
1999	3.427110280812885
2000	3.080664625349928
2001	2.0978953536376435
2002	0.9610226766200711
2003	1.720604660157656
2004	2.0085580621358163
2005	2.4903550622721804
2006	1.9357136310444505
2007	2.7180496441144735
2008	2.313930854982587
2009	3.1771676314583988
2010	5.4505297811340805
2011	3.9113089009298863
2012	9.81219617618624
2013	20.62982907637454
2014	4.027935135148618
2015	6.196427064827007
2016	4.647403909146593
2017	4.597158057916519
2018	4.941854222995484
2019	7.498945834809366
2020	10.297278190002087