Year	% of total merchandise exports
1960	14.201183431952662
1961	15.251572327044025
1962	10.845588235294118
1963	20.319634703196353
1964	26.11036339165545
1965	18.9873417721519
1966	7.142857142857142
1967	7.917174177831912
1968	24.401368301026224
1970	13.960867265996823
1981	0.7662835357816467
1982	4.268815550658781E-09
1983	-5.126435453786154E-09
1984	12.159511874023995
1985	32.57975533952146
1986	50.303786488824855
1987	29.46696900593559
1988	35.923465462103
1989	13.588360830734747
1990	2.84603867894407
1991	0.5911825975618631
1992	0.1764716604290431
1993	0.3532910887367668
1994	0.4220810414304408
1995	0.5288623200798115
1996	0.977096865413991
1997	0.2556645680866703
1998	0.3749330476700589
1999	25.5100667269196
2000	0.017489969752233034
2001	0.28577973462177486
2002	0.30197887389488426
2003	0.03153742744025407
2004	0.03311793514540675
2005	0.04223410482588773
2006	0.10424674103726762
2007	0.10688985357888016
2008	0.14805774555729637
2009	0.06688155808560671
2010	0.2067539162129665
2011	0.11816340988207702
2012	0.14154553864094188
2013	0.28600652468503446
2014	0.43526369504455364
2015	0.40162941807795327
2016	0.37564754139871026
2017	0.36029149475294897
2018	0.3657588251468386
2019	0.35692928146847885
2020	0.4238799206227134