Year	% of merchandise exports
1974	7.992636675782659
1975	7.786852849460877
1976	9.816042396846713
1977	9.36826131409137
1978	8.977571837786577
1979	7.5776733928362745
1980	6.556319191456692
1981	8.48920702671641
1982	9.75392856687159
1983	15.090072272741798
1984	13.229266110089094
1985	12.127262670627173
1986	38.03933315005165
1987	31.143241185858322
2000	7.885586151541302
2001	2.470207577159783
2002	7.330040177765712
2003	10.70486866240913
2004	11.223416735802816
2005	13.583805647137426
2006	32.00782301889895
2007	34.768571492253955
2008	33.02505019140803
2009	31.027867831643967
2010	24.720854988307387