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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $141,358 | 15,597 | 4,623 |
| 2006 | $104,281 | 9,461 | 4,141 |
| 2007 | $77,874 | 7,477 | 2,741 |
| 2008 | $144,105 | 9,358 | 3,669 |
| 2009 | $47,169 | 2,639 | 827 |
| 2010 | $64,026 | 4,725 | 1,145 |
| 2011 | $84,182 | 8,476 | 1,001 |
Note: Quantity represents Number of pairs
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