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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $627,695,562 | 2,318,233,454 | 2,318,233,454 |
| 2006 | $684,932,487 | 2,529,292,788 | 2,529,292,788 |
| 2007 | $790,643,012 | 1,670,847,059 | 1,670,847,059 |
| 2008 | $1,083,977,150 | 7,962,110 | 7,962,110 |
| 2009 | $100,125,023 | 9,118,237,564 | 9,118,237,564 |
| 2010 | $2,780 | 1,501 | 1,501 |
| 2011 | $20,992 | 1,629 | 1,629 |
Note: Quantity represents Weight in kilograms
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