Year	% of total merchandise exports
1960	0.04892367906066536
1961	0.2729372244383792
1962	0.11411182959300116
1963	0.05582433941198362
1964	0.1498800959232614
1965	0.1348112642300779
1966	0.13063357282821686
1967	0.1808785529715762
1968	0.5905511811023622
1969	0.22431894916978865
1970	0.09829744999236525
1971	2.6962018235721876
1972	4.808830993063779
1973	4.102749431758743
1974	4.958346209735217
1975	4.728618729774981
1976	3.929795796691012
1977	2.34026831690027
1978	1.8587943639169258
1979	0.286521256448769
1980	2.355649112767664
1981	2.3194137704796844
1982	0.5063863611446113
1983	0.9606692093102659
1984	0.011988037882199709
1985	2.2220656520922244
1986	3.1579157516470358
1987	2.804628058564749
1988	5.23544047694316
1989	0.5726401563658808
1990	1.4795427040044686
1991	5.5674022284027185
1992	8.323278880483073
1993	5.578846650628282
1994	9.321052151606857
1995	9.427510113705607
1996	10.231959352874028
1997	10.126513578839843
1998	5.477576779162889
1999	5.675028042550251
2000	9.242065881400817
2001	8.661532748943856
2002	9.043723610116631
2003	8.660780846711713
2004	10.859173070885095
2005	11.67942062441709
2006	10.700834857120899
2007	11.570103481307289
2008	13.185821715595997
2009	16.07296756513884
2010	16.507227516050335
2011	16.389653395556177
2012	18.210937192321193
2013	18.663900176675636
2014	19.468674672447957
2015	23.051999557361576
2016	24.19704415460954
2017	27.641074675492995
2018	28.91885820147193
2019	30.47455911822456
2020	30.509415054729782