Year	% of total merchandise exports
1960	2.2881861806763224
1961	1.9180265295044439
1962	2.301114898001613
1963	2.3961136936634606
1964	2.681749984915326
1965	3.2243153566695835
1966	3.0839530298560662
1967	2.880739850953113
1968	3.19728494857583
1969	3.5055753815528834
1970	3.5189857447872925
1971	3.7136167883487503
1972	3.7891414131252987
1973	3.6580927015964706
1974	4.288725737743896
1975	4.567083602254283
1976	4.0740826217493264
1977	3.9643312908290174
1978	3.717419959730238
1979	3.758204170659582
1980	4.2457597949165935
1981	4.815373179077805
1982	4.483614997621158
1983	3.8443645774470223
1984	3.7746114730893234
1985	3.6701134086435787
1986	3.4542256298445326
1987	3.3913686953978313
1988	3.2032453400347882
1989	3.26663272783723
1990	3.0797240840664712
1991	3.1728180171874842
1992	3.331502263060307
1993	3.756530626654359
1994	3.789667354720888
1995	3.7036242198902327
1996	3.832153793526322
1997	4.223429848978751
1998	4.36938410794281
1999	3.6083414916199437
2000	3.6352167759436433
2001	3.7542480542337895
2002	3.401351083426534
2003	3.2270271824817223
2004	3.5122218087543984
2005	3.5652596938400665
2006	3.755594778024624
2007	3.8731679871019957
2008	4.209123306151883
2009	4.060162533948604
2010	4.446206600543918
2011	4.6398881880752345
2012	4.561469820947854
2013	4.572164406580344
2014	4.491197792303296
2015	4.430406809590397
2016	4.321679413037096
2017	4.45930913555804
2018	4.403474843440668
2019	4.330156166166555
2020	4.148796113247821