Year	% of total exports
1997	8.859286827054559
1998	8.694931901745612
1999	9.168022938554044
2000	8.156039179553167
2001	8.64945318822698
2002	8.533976009938277
2003	7.305816063697933
2004	7.233618662056677
2005	8.1721017696516
2006	7.81522894248264