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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $58 | 30 | 30 |
| 2006 | $2,206 | 2,461 | 2,461 |
| 2007 | $8,247 | 5,816 | 5,816 |
| 2008 | $35,789 | 40,975 | 40,975 |
| 2009 | $80,236 | 174,232 | 174,232 |
| 2010 | $8,480 | 8,885 | 8,885 |
| 2011 | $14,354 | 15,419 | 15,419 |
Note: Quantity represents Weight in kilograms
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