Year	% of total merchandise exports
1976	1.0441523973599356
1977	0.7740998235965549
1978	0.32327350033971114
1979	0.7039467901198394
1980	1.1467083595455723
1981	2.2007618383942065
1982	1.8495200988311318
1983	1.8495200987586158
1984	1.8495200990729628
1985	1.8495200989630696
1986	1.690901572106725
1987	2.112617171917496
1988	2.015332388756906
1989	1.5983074919303126
1990	1.0635454457387983
1991	1.4077697516384087
1992	1.521046878882767
1993	1.6094135642598946
1994	1.249460707445877
1995	1.3934680600277647
1996	1.598458500143967
1997	2.127191192912155
1998	2.140406426214298
1999	1.7426066062931695
2000	4.185955526755721
2001	3.404954734342774
2002	3.2570252305410192
2003	3.658137917279422
2004	3.456888696182984
2005	3.3969717328199347
2006	3.9345728454904054
2007	4.394600157703015
2008	3.735250387885337
2009	4.878040336861892
2010	4.08683405641145
2011	4.5613701875453865
2012	3.570333013160028
2013	3.7268567974328843
2014	4.959689525280921
2015	5.980701427166967
2016	5.775844719854829
2017	6.391328151335933
2018	5.600844076580435
2019	6.428466793376892
2020	6.156155652655633