Year	% of total merchandise exports
1964	0.501952035694367
1965	0.7318348144276007
1966	0.10741138560687433
1969	0.2740751834656283
1970	1.5421431615010825
1971	2.05448817672682
1972	1.289346077304706
1973	0.7729489635951925
1974	0.7316058434269297
1975	1.575194913112905
1976	4.682861493862723
1977	5.027266277877362
1978	2.3935545186212153
1979	1.4600834876701667
1980	4.05658711444811
1981	8.26787799559112
1982	8.518408729397589
1983	11.898019128702552
1984	5.302580322494991
1985	2.097133199697631
1986	0.8747872313048466
1987	1.0818256817545355
1988	4.575527630373533
1989	2.7451150619182565
1990	3.0588084355334506
1991	1.8018574057535997
1992	1.1798951204337393
1993	0.917179437933756
1994	1.1258993426026997
1995	0.8614864307281254
1996	0.8848269080827124
1997	0.9171838152135644
1998	1.3218576909150441
1999	1.1703371128449782
2000	0.858076920194053
2001	0.6963907156283368
2002	3.3846344635823518
2003	2.496474488074813
2004	2.731657866802249
2005	2.6549529650321957
2006	3.48842913114277
2007	2.8393279079081584
2008	2.6248567290406015
2009	5.462438027772552
2010	2.786292324758534
2011	2.546857338356287
2012	3.5434070273259186
2013	4.142617321232317
2014	5.082147740513631
2015	3.431292671908518
2016	1.8341188136022795
2017	3.5595708062613016
2018	5.216224773539936
2019	3.9887344589719924
2020	4.6326130388168085