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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $3,644,238,548 | 0 | 0 |
| 2006 | $4,116,944,423 | 0 | 11,609,172 |
| 2007 | $5,520,289,363 | 2,205 | 0 |
| 2008 | $7,890,824,513 | 4,046 | 18,222,592 |
| 2009 | $7,143,283,611 | 0 | 18,784,724 |
| 2010 | $10,017,216,297 | 0 | 21,782,893 |
| 2011 | $13,107,889,527 | 0 | 20,204,827 |
Note: Quantity represents No Quantity
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