Year	% of total merchandise exports
1960	6.827309236947792
1961	7.764705882352942
1962	7.803873094355171
1963	8.237970004975478
1964	8.672863232930323
1965	7.7916379364382875
1966	7.622056289488799
1967	6.938232805511905
1968	6.733630952380952
1969	7.256689259961393
1970	6.6156143983464615
1971	6.869142778390298
1972	7.141929392487649
1973	9.111924888688133
1974	7.393364690431473
1975	10.169110008080342
1976	10.631767844728039
1977	8.858854158084661
1978	7.4125373247603985
1979	7.066308652960306
1980	7.796056586581504
1981	9.177022953810724
1982	10.219518157965597
1983	9.466879376733875
1984	7.64266255293827
1985	7.770759664597117
1986	7.186251038453005
1987	7.61442543701365
1988	9.570863943775016
1989	5.907835452018777
1990	6.5990399658681715
1991	6.58761540420875
1992	8.945349406859753
1993	5.350091850607564
1994	5.560259056704389
1995	5.66393488873223
1996	5.463804052038136
1997	6.069760264424656
1998	7.297656005621336
1999	6.873062241233442
2000	12.675995654929192
2001	8.611908195395204
2002	6.442211712969839
2003	5.768324701767284
2004	6.334986367406388
2005	5.710867020908424
2006	5.1210281011926275
2007	3.536585631053124
2008	5.502721066271938
2009	4.7585386858987135
2010	4.412721005868806
2011	4.285401846991462
2012	4.704139588994705
2013	4.136677208821217
2014	4.2888709111506
2015	3.1571644605355407
2016	1.826642035566055
2017	1.4344346219899713
2018	1.1475785218865915
2019	0.2162316282628263
2020	0.42084074770071145