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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $149,515 | 8,639 | 5,092 |
| 2006 | $76,321 | 3,442 | 2,386 |
| 2007 | $296,346 | 21,134 | 10,987 |
| 2008 | $394,798 | 17,654 | 43,164 |
| 2009 | $530,636 | 21,218 | 20,597 |
| 2010 | $638,025 | 22,187 | 21,238 |
| 2011 | $1,765,958 | 31,661 | 40,412 |
Note: Quantity represents Number of pairs
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