Year	% of total merchandise exports
1964	6.435643564356436
1965	1.4018691588785046
1967	1.9169329073482428
1968	3.076923076923077
1969	2.405002405002405
1970	2.9636150234741785
1971	1.466916354556804
1972	1.449579831932773
1973	1.604744461887319
1974	3.540457716632979
1975	8.034076015727392
1976	5.529264052540081
1977	1.624874623871615
1978	3.4102850944099803
1979	3.1071259085346052
1980	4.376160195900312
1981	3.862867286747166
1982	0.6930403320208578
1983	1.3533555802743789
1984	1.2514744382749792
1985	2.0648049330013043
1986	1.6564662159968637
1987	1.8694753161231343
1988	2.45078817347659
1989	2.0435109031956005
1990	2.4725183148640655
1991	1.9116499377122886
1992	2.74984832792773
1993	5.606792068782502
1994	2.4044733769562567
1995	2.687362832861017
1996	2.5209595081888976
1997	2.582293709960649
1998	1.0532038735420433
1999	1.7033771320940951
2000	1.494051336149949
2001	0.914548234154129
2002	0.9573495420864586
2003	1.0355214299833007
2004	1.0845168731333605
2005	1.1626908209120272
2006	0.6572571155981812
2007	0.819011617182861
2008	1.0374459171589685
2009	1.279695000730492
2010	1.6831578728255656
2011	2.603342016144384
2012	3.123923084406344
2013	2.617208570507303
2014	3.388754892036071
2015	2.1518462399711358
2016	2.025518400866443
2017	2.0131639003722452
2018	1.489956050094138
2019	1.0474480764017935
2020	1.2328683956772915