Year	% of total merchandise exports
1970	1.9105497410976784
1971	1.3455543761508881
1972	1.2069294432335236
1973	1.2098842976234525
1974	1.5434057323064794
1975	3.034025196501199
1976	3.5012363071270114
1977	2.8912978961409137
1978	2.4155465605402866
1979	2.636871603945685
1980	3.9475996184917497
1981	4.487861721308016
1982	6.685252399296354
1983	5.6074475855959465
1984	5.252508785738363
1985	4.8489142517451596
1986	3.615299051077177
1987	2.99799890879365
1988	3.5829570249547444
1989	3.4452282754797734
1990	3.2651359394534794
1991	2.297236462644824
1992	3.101717439793144
1993	2.1150677007691874
1994	1.6049777557525835
1995	1.2972907396316702
1996	1.1390340829979648
1997	1.3311651184548519
1998	0.9420369749194002
1999	0.8721567872441124
2000	0.8189118307554732
2001	1.0627850284862743
2002	0.7748586522586897
2003	0.6380271917278862
2004	0.5749230614700321
2005	0.7748685431239709
2006	0.6747155938897705
2007	0.6193226062371365
2008	0.7291352740706967
2009	0.8019454376640373
2010	0.6438650968852716
2011	0.6104925734207194
2012	0.6540251671519466
2013	0.7183799938546178
2014	0.8984620048897534
2015	0.822647634639722
2016	0.7562510840607015
2017	0.6451417815876158
2018	0.6256222028303676
2019	0.7145924484705264
2020	0.6839129311330744