Year	% of total merchandise exports
1960	23.004953219592736
1961	20.908071748878925
1962	26.87555163283319
1963	20.407259849490924
1964	18.533604887983707
1965	20.041004613018963
1966	24.07498766650222
1967	20.364315740308268
1968	19.715884631941456
1969	26.439155179376584
1970	23.872725262279644
1971	28.136576575479655
1972	37.108911112415086
1973	31.544683053277094
1974	22.8926082166445
1975	22.926950272295084
1976	19.81383314628839
1977	24.578816966514097
1978	21.639982192029283
1979	21.326700846354164
1980	16.745647451901625
1981	15.044674633799124
1982	14.1414499815692
1983	23.746073084330664
1984	29.071187549929807
1985	26.292514183040478
1986	24.368620956564
1987	22.54909279046715
1988	18.950746238450726
1989	24.653023501486036
1990	32.73665225661914
1991	31.00423207232336
1992	31.255184910889756
1993	26.45507917292803
1994	33.53646328278245
1995	36.71014790549098
1996	36.937419473985756
1997	29.388899467987805
1998	23.935237285308894
1999	24.170980542332952
2000	15.853084025633626
2001	15.986347795727077
2002	16.378628262035665
2003	54.23290810690175
2004	75.35603649568972
2005	77.10021907500487
2006	4.580392207932304
2007	2.087270885540598
2008	6.152991536860878
2009	7.2522512421421
2010	3.968924706228015
2011	2.3044551974792444
2012	7.182798063578575
2013	6.050380271798088
2014	10.168038643182022
2015	15.457074728052886
2016	25.27219106593
2017	19.217512536108533
2018	26.18498726024902
2019	22.585874451391337
2020	22.585874497160276