Year	% of total merchandise exports
1960	2.1074477906896893
1961	1.9752918816182459
1962	1.9781909688242696
1963	1.599376829266786
1964	1.564608039345941
1965	1.4486841370596037
1966	1.0666397564685828
1967	0.9081275947379106
1968	0.7423506101424779
1969	0.6963703330550176
1970	0.5580700200103044
1971	0.4242736755947786
1972	0.6055244531376728
1973	0.7279208536109547
1974	0.47366517722632984
1975	0.4423215929136406
1976	0.332490340502511
1977	0.2536404508008559
1978	0.4744050547481626
1979	0.4463566007601065
1980	1.4684502373864299
1981	0.5463909854890117
1982	0.41194571554490683
1983	0.42294759422847317
1984	0.3834233091519228
1985	0.615871642367392
1986	0.8715225601698512
1987	0.3404639196472717
1988	0.6709283503743602
1989	0.8028048844404165
1990	1.4574508586842398
1991	0.8661620163417594
1992	0.7672176776824886
1993	1.0820848129843386
1994	0.9695604106555008
1995	0.9561605840245682
1996	1.0488437294301876
1997	1.0813499346253703
1998	0.9157638235790675
1999	0.6833756594570205
2000	0.3657601039818985
2001	0.4137319431993807
2002	0.3997142439587908
2003	0.4225363027102028
2004	0.38757520671651136
2005	0.24845660408875198
2006	0.2497297365951281
2007	0.3299743014752883
2008	0.20633586777566693
2009	0.2986369722480786
2010	0.31323081174134915
2011	0.17100863090003077
2012	0.24919586111788838
2013	0.21998671637564007
2014	0.2605765178206637
2015	0.5144083259871116
2016	0.5799254238388541
2017	0.6220285476450009
2018	0.5026073611195124
2019	0.2719920501188001
2020	0.33541018395292954