Year	% of total merchandise exports
1960	4.225021148604192
1961	5.1724927841663995
1962	4.648252435863055
1963	3.964936487967209
1964	3.837540330233441
1965	4.022165259348612
1966	3.9599801428189556
1967	3.9950769599191314
1968	3.405327221776617
1969	3.215550214146944
1970	4.15988321894207
1971	4.82386196631708
1972	4.243141620090565
1973	3.049965121544533
1974	4.1913412637192495
1975	4.904284931849547
1976	3.7312621886075736
1977	4.523579057367521
1978	4.324215741592607
1979	4.253222742402833
1980	4.384243621141325
1981	5.2840210153827885
1982	3.728387751248077
1983	3.0597586536181365
1984	2.5895851080912466
1985	2.6485548198685134
1986	2.3937692917587787
1987	2.142497065850556
1988	1.7831622208164803
1989	0.999588002739034
1990	1.489891240021402
1991	1.9651091958530993
1992	2.2028592714810427
1993	1.8847519569468705
1994	2.2242415494460417
1995	3.0319883327580026
1996	2.9980515203397085
1997	3.316139355570783
1998	3.562544174968279
1999	3.1150177542058333
2000	2.8703231390333195
2001	3.382025387150991
2002	3.6397286770861403
2003	3.68965866235339
2004	4.136649330560703
2005	4.244308217188348
2006	4.859125229692417
2007	5.253316978583439
2008	5.116190522165945
2009	5.124630241155921
2010	5.4103754526524686
2011	5.377072682351412
2012	6.431646754646867
2013	7.050868181320601
2014	7.6022508879826285
2015	6.736775514977328
2016	5.971713810161192
2017	5.801904694099601
2018	5.567346778579825
2019	6.298469472961815
2020	6.78567060925108