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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $287,822,205 | 12,082,459,976 | 12,082,459,976 |
| 2006 | $240,196,999 | 9,492,803,080 | 9,492,803,080 |
| 2007 | $263,272,226 | 8,636,969,048 | 8,636,969,048 |
| 2008 | $480,739,017 | 13,883,596,960 | 13,883,596,960 |
| 2009 | $475,575,277 | 14,689,525,040 | 14,689,525,040 |
| 2010 | $474,377,002 | 12,901,709,080 | 12,901,709,080 |
| 2011 | $514,066,590 | 13,842,304,960 | 13,842,304,960 |
Note: Quantity represents Weight in kilograms
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