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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $239,785 | 333,317 | 1,139,084 |
| 2006 | $365,231 | 600,140 | 1,797,176 |
| 2007 | $954,709 | 1,148,890 | 1,353,395 |
| 2008 | $837,477 | 214,869 | 1,052,353 |
| 2009 | $650,861 | 922,467 | 870,992 |
| 2010 | $485,576 | 574,455 | 528,500 |
| 2011 | $417,495 | 619,049 | 441,529 |
Note: Quantity represents Number of pairs
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