Year	% of total merchandise exports
1970	0.6442173820704628
1981	7.724171189796028
1982	3.7966204470859584
1983	8.517406019510727
1984	7.0459970525098505
1985	6.84223980003099
1986	7.034338687900626
1987	4.793089143067155
1988	5.058652477388959
1989	6.08159754972339
1990	8.416056165555178
1991	5.679185901424872
1992	7.424538297666274
1993	5.241314245525902
1994	4.150499298347997
1995	4.133249471243776
1996	3.511605118864337
1997	5.6100888236880575
1998	4.849676076588284
1999	4.736096705861701
2000	5.9587334359633815
2001	14.51540079593503
2002	1.4081224558402659
2003	10.383301822372006
2004	1.331906165049768
2005	6.572442720987463
2006	2.7800370644072343
2007	3.1171789880493037
2008	2.1291273945660896
2009	4.686273022660367
2010	4.83332649265585
2011	5.455999639810938
2012	4.086169506523118
2013	4.770759015202935
2014	22.005760050435917
2015	23.836804878651176
2016	16.93858396421278
2017	11.15891818309542
2018	11.595275946852224
2019	9.32227093911386
2020	7.824031117115037