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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $9,168 | 26,000 | 26,000 |
| 2006 | $3,173 | 7,500 | 7,500 |
| 2007 | $9,921 | 13,285 | 13,285 |
| 2008 | $31,922 | 47,915 | 47,915 |
| 2009 | $68,503 | 43,289 | 43,289 |
| 2010 | $41,824 | 49,547 | 49,547 |
| 2011 | $134,400 | 183,065 | 183,065 |
Note: Quantity represents Weight in kilograms
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