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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $301,120,000 | 64,103,900 | 64,103,900 |
| 2006 | $356,214,000 | 80,185,850 | 80,185,850 |
| 2007 | $436,433,000 | 89,920,918 | 89,920,918 |
| 2008 | $465,264,000 | 93,098,000 | 93,098,000 |
| 2009 | $391,500,000 | 84,065,288 | 84,065,288 |
| 2010 | $486,914,457 | 106,413,800 | 106,413,800 |
| 2011 | $603,415,286 | 108,458,665 | 108,458,665 |
Note: Quantity represents Weight in kilograms
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