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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $2,486,187,112 | 337,492,136 | 337,492,136 |
| 2006 | $2,464,229,359 | 334,511,439 | 334,511,439 |
| 2007 | $2,714,641,296 | 250,356,952 | 250,356,952 |
| 2008 | $3,030,349,896 | 422,214,347 | 422,214,347 |
| 2009 | $2,704,821,184 | 228,261,017 | 228,261,017 |
| 2010 | $3,290,729,584 | 627,260,302 | 627,260,302 |
| 2011 | $4,478,647,444 | 696,534,821 | 696,534,821 |
Note: Quantity represents Weight in kilograms
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