Year	% of merchandise exports
1977	27.852281106051795
1978	22.434942410422064
1979	21.17590801806032
1980	18.699551944668862
1981	16.436335899638095
1982	15.600280204865975
1983	15.451533374237997
1984	15.267032590947574
1985	13.288330923069722
1986	13.361027473854426
1987	8.609448779714286
1989	6.754306044374683
1990	6.811230595826818
1991	5.421778234328867
1992	4.743527965797044
1993	3.2311729954771806
1994	1.9851401557843023
1995	2.651085123525343
1996	2.110665582823602
1997	2.6397373645558653
1998	1.7043195244637273
2000	1.4488005000280317
2001	0.9862727574532792
2002	1.0332067779257863
2003	0.9358377147924398
2004	1.257730754185155
2005	1.7154860088881574
2006	1.6427683946669862
2007	3.1231034330133234
2008	1.5350715729586162
2009	1.5424091605800385
2010	1.94860335841044
2011	1.7535465732422033
2012	1.3932975927866849
2013	1.0513641186178981
2015	0.747182515389268