Year	% of total merchandise exports
1960	2.0616668828542872
1961	1.982079826228618
1962	1.9851810429190548
1963	1.6302635626735063
1964	1.6172884447111242
1965	1.6046188879236583
1966	1.229687354028333
1967	1.043449938986711
1968	0.8168727680777754
1969	0.7467460592760189
1970	0.6225817233382033
1971	0.6880920244905225
1972	0.904928734314211
1973	1.1194210743965778
1974	0.6041616171961786
1975	0.655247454234108
1976	0.4418210160620474
1977	0.42239808142146174
1978	0.5913966378748471
1979	0.5323727593231974
1980	1.7398661462614935
1981	0.7201018691143718
1982	0.5390553093548913
1983	0.5590217593997119
1984	0.4852418070696798
1985	0.7302109031614448
1986	1.0384617281744302
1987	0.5348570669425192
1988	0.8647090330198512
1989	0.8646504033131626
1990	1.4951585115546406
1991	0.934631717125552
1992	0.8181913010959018
1993	1.1529034538357394
1994	1.0480491737424886
1995	1.0950301165265142
1996	1.152510237119193
1997	1.1483739811972964
1998	1.0948275408594463
1999	0.8687126656453995
2000	0.47327122921392234
2001	0.6070610137801448
2002	0.633436148557498
2003	0.6098488215979623
2004	0.5553007422855589
2005	0.3853461032935166
2006	0.4074359577501587
2007	0.4220224902278577
2008	0.6343075940806486
2009	0.8683608976611452
2010	1.0813442408648961
2011	1.0951285858735433
2012	1.5146508304191084
2013	1.598317853968434
2014	1.569358410248066
2015	1.4122782743276383
2016	3.505555963485585
2017	2.2866682387224833
2018	1.6638734363973662
2019	2.0280744717002297
2020	3.194137269677525