Year	% of total exports
1997	8.87844604545663
1998	8.69897666685894
1999	9.172475518527335
2000	8.161350141632031
2001	8.66657087942787
2002	8.556444633678458
2003	7.354725906916193
2004	7.324313466257177
2005	8.25264474389735
2006	7.887742477776846