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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $138,137 | 4,170 | 33,595 |
| 2006 | $104,168 | 3,144 | 22,698 |
| 2007 | $128,916 | 3,388 | 23,962 |
| 2008 | $157,338 | 3,914 | 30,261 |
| 2009 | $128,906 | 2,573 | 37,533 |
| 2010 | $195,836 | 3,723 | 32,306 |
| 2011 | $178,289 | 3,444 | 27,490 |
Note: Quantity represents Number of pairs
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