Year	% of merchandise exports
1977	13.04660825919858
1978	13.68297200872596
1979	12.721089004774994
1980	12.451264337528555
1981	15.69587128903627
1982	19.970054937076963
1983	19.281838655198435
1984	17.983328846420314
1985	17.918522834489725
1986	20.195849324310135
1987	18.64081885490243
1989	17.88566697144402
1990	14.33189084019487
1991	12.644366827225163
1992	11.030888509781192
1993	11.84121934440761
1994	13.609184181793385
1995	10.448815520550452
1996	10.091939905830822
1997	8.360057934738363
1998	7.229672182833566
2000	7.612916657503792
2001	6.069669415972943
2002	6.821453963792769
2003	5.78812281014859
2004	6.184299640175945
2005	6.22182176823361
2006	5.928288427309615
2007	6.519945227605691
2008	4.819080480029571
2009	3.694887123025995
2010	4.0297492269178035
2011	3.8599562931167912
2012	2.643993366928326
2013	3.9502047909876934
2015	2.705992786769949