Year	% of total merchandise exports
1964	62.04986149584487
1966	60.30927835051546
1967	70.01934235976789
1968	69.377990430622
1969	54.13523860061403
1970	53.590870667793745
1971	69.35275754422476
1972	70.59236194016074
1973	69.57996557589911
1974	63.38210127176941
1975	64.96751514620011
1976	70.94378235223306
1977	74.46944677857465
1978	78.80830873631072
1979	79.54189027193551
1980	72.97847230700361
1981	70.77502464947288
1982	72.1128948967895
1983	64.17691681348018
1984	72.84097905244016
1985	77.8764913267863
1986	74.82149922664652
1987	65.68273512152113
1988	71.38332444949609
1989	75.37759013151685
1990	73.79718786468962
1991	74.24890712616427
1992	71.62850003251108
1993	60.36659522272543
1994	59.74525539955003
1995	77.05460418497493
1996	66.2332618206371
1997	68.67150137942062
1998	68.46499192706655
1999	71.589954308489
2000	65.73141552779211
2001	58.419464834807336
2002	62.45793196196657
2003	58.46689571336733
2004	57.038742573192145
2005	58.26802753836417
2006	52.87047290077418
2007	49.85777907808986
2008	60.75093710809659
2009	48.979617184315266
2010	57.20146065261592
2011	48.382798337444335
2012	53.13232708317904
2013	56.460945846184195
2014	47.610680529428556
2015	42.3736412223821
2016	49.887948683254606
2017	52.182886261652094
2018	49.073547809129806
2019	47.73883990970999
2020	45.9458225493728