Year	% of total merchandise exports
1964	0.2540618132391611
1965	0.29186854240849924
1970	0.0033835985698656714
1971	0.0011007275809309955
1972	0.008467759007578644
1973	0.0008360365180751095
1974	0.0005094710671380972
1975	0.0004820833714982669
1976	0.008560452847955657
1977	0.05347751362754571
1978	0.001665323305866601
1979	1.2326547346534364
1980	0.9938946471674003
1981	0.014844520773193991
1982	0.021111929269887694
1983	0.0125370261871115
1984	0.004470199912919386
1985	0.0023631434860124064
1987	0.15990325627608823
1988	0.006770674217434871
1989	0.004082537735318802
1990	0.013133925242098476
1991	0.028221006264323948
1992	0.38091189877389925
1993	0.05982593318246153
1994	0.002455007296800834
1995	0.006231379291863229
1996	0.009456655018989981
1997	0.10909845155259502
1998	0.5170549260682854
1999	0.007666895565810084
2000	0.9869003110284876
2001	0.8774687836312646
2002	0.0664287622927861
2003	0.05637054503847725
2004	0.20502540090105512
2005	0.08565603413361206
2006	0.6196559326476714
2007	1.46846604064548
2008	0.31500111635270805
2009	1.3589095084230227
2010	2.69170046617091
2011	2.333801878531867
2012	1.6252271332875707
2013	1.4540874754299984
2014	1.4165466284336024
2015	0.6102563145059422
2016	0.896088600606406
2017	1.0354003502187967
2018	1.148469427882349
2019	1.8164228129661004
2020	1.849899949225732