Year	% of total merchandise exports
1960	7.176654743270026
1961	6.627395219716973
1962	6.150767382071213
1963	9.036388446473124
1964	8.495612012493876
1965	8.528806227929703
1966	9.632677287970067
1967	9.43691044350354
1968	11.514756663359488
1969	9.331765202955308
1970	10.111085307095582
1971	7.829976271776561
1972	8.38171510815258
1973	9.515289757150342
1974	10.334545258451236
1975	12.32696774895424
1976	13.661392501684706
1977	13.12252355620348
1978	9.798797447354673
1979	11.204626689083602
1980	10.675059911793753
1981	14.285686867659592
1982	10.192319074973245
1983	9.139679027702142
1984	9.457682255205716
1985	7.282815633685144
1986	9.571161135081315
1987	9.86591596147105
1988	10.179775653695454
1989	8.660716174638766
1990	7.109056722459771
1991	8.21108647761397
1992	8.447365880014608
1993	6.751973960028994
1994	7.820894876948663
1995	7.205009612266876
1996	6.780893475457139
1997	3.168345013621
1998	12.847156886982603
1999	6.862314664118592
2000	4.304022632471444
2001	10.68828713882082
2002	9.280505265188078
2003	6.096206405130297
2004	5.712099773598655
2005	4.600378428030213
2006	2.107850538159546
2007	1.9214626802712025
2008	1.9544818758268232
2009	1.815840929032078
2010	4.142265566597782
2011	4.072792126556619
2012	3.8138528134994285
2013	3.634602593685866
2014	3.5696129825437706
2015	3.9060897083999437
2016	3.562830144651351
2017	3.2458743877227185
2018	3.21837570453173
2019	2.5200683079790993
2020	3.767225729163922