Year	% of total merchandise exports
1960	6.726647261180206
1961	5.871871709727059
1962	5.113935451737924
1963	4.762698317315747
1964	4.462947729890828
1965	6.67386363971936
1966	7.137323034301411
1967	4.632882552510279
1968	3.7400182459715268
1969	3.528501598083728
1970	2.664565820591952
1971	2.944266986207943
1972	3.1581094039636564
1973	1.8068242322478656
1974	2.9497914844730926
1975	3.3390268716225378
1976	2.6746598646637647
1977	3.8175066258152133
1978	4.4317072751629505
1979	3.9740559272483376
1980	4.503389515030487
1981	6.859270657322848
1982	7.758241961535727
1983	8.03371310288358
1984	7.862985141883935
1985	6.552398826012211
1986	7.103646266903682
1987	7.24052133860415
1988	6.638403844346417
1989	4.671445403267393
1990	4.875549904005911
1991	4.252573863952544
1992	5.7329478538592635
1993	6.193206403200683
1994	5.4106010456941975
1995	5.769959497248161
1996	5.53768399152355
1997	5.822484251044005
1998	6.774224878419005
1999	6.494364123062672
2000	6.592318209729441
2001	7.072305141330512
2002	7.4829805571470205
2003	8.177895828358505
2004	8.85613515603886
2005	9.706733135418096
2006	10.978552044296109
2007	13.070975464012305
2008	14.71105391360451
2009	14.357313049372808
2010	15.178477804252788
2011	16.033046653330725
2012	15.996685587422267
2013	16.17787373178606
2014	16.75743480032245
2015	16.294231507417038
2016	16.404488973660932
2017	16.71419646836433
2018	16.562845356041475
2019	16.762737465598374
2020	15.649431980949538