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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $659,553,813 | 12,136 | 12,136 |
| 2006 | $1,560,874,975 | 16,492 | 16,492 |
| 2007 | $2,234,843,962 | 14,673 | 14,673 |
| 2008 | $1,892,024,046 | 10,826 | 10,826 |
| 2009 | $577,453,114 | 14,534 | 14,534 |
| 2010 | $906,139,495 | 13,260 | 13,260 |
| 2011 | $819,313,068 | 13,537 | 13,537 |
Note: Quantity represents Weight in kilograms
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