Year	% of total merchandise exports
1960	2.286585365853659
1961	2.8328611898017
1962	1.431980906921241
1963	1.2806830309498398
1964	0.5405405405405406
1965	0.69713400464756
1966	0.5706134094151213
1967	0.7276507276507277
1968	1.3431013431013432
1969	1.8519034484039638
1970	0.9056567880097292
1971	1.1793539597844305
1972	1.1021546155013051
1973	0.8117313752745561
1974	0.7322734585583328
1975	0.5834137722297662
1976	0.764550436350739
1977	0.3038866635548881
1978	1.4839115458868588
1979	0.39972702817934713
1980	1.0867160621908467
1981	0.1922256400633529
1982	0.20498649715280323
1983	0.30350531066727926
1984	0.19136931166554866
1985	0.2006196509095371
1986	0.15728697723938131
1987	0.1366320881077001
1988	0.12384368827494138
1989	0.36830406510449804
1990	0.23081665173542834
1991	0.25384811707191435
1992	1.306734711421409
1993	0.26474424552970766
1994	0.25384694036133215
1995	0.41400737926297154
1996	0.6147248672749532
1997	0.6994214779512801
1998	0.616725648702444
1999	0.134205055590007
2000	0.07625646384343818
2001	0.13340267031869382
2002	0.1278685867844136
2003	0.04709781212233389
2004	0.0986068304479139
2005	0.07753030877030673
2006	0.1200082814879055
2007	0.13859525777064785
2008	0.23678423397487056
2009	0.11419739291836524
2010	0.20044361215011056
2011	0.23112649921350742
2012	0.2909310929074622
2013	0.3521229747163985
2014	0.430152501108587
2015	0.32023898279365254
2016	0.40066917805617946
2017	0.3346260771782955
2018	0.3428621989520905
2019	0.30421242449362584
2020	0.18128791774120315