Year	% of merchandise exports
1974	27.898513556937885
1975	15.004856003301665
1976	18.012806091779158
1977	22.711979031237593
1978	18.702319156799422
1979	13.498888861829444
1980	9.087061093977766
1981	7.485632155703432
1982	6.728297937668598
1983	9.910341525919304
1984	16.305160529415875
1985	9.77859924118752
1986	9.990672351053204
1987	8.784775983693834
2000	4.628211189268141
2001	4.292518053981899
2002	3.4371575172935245
2003	3.02031796952372
2004	3.6246847515165865
2005	3.4089681772803604
2006	2.146298799239154
2007	1.2217382077163932
2008	1.1180938120678692
2009	1.3452506726234381
2010	1.6817741419649146