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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,134,670 | 58,775 | 101,447 |
| 2006 | $766,170 | 26,382 | 39,391 |
| 2007 | $658,169 | 56,929 | 93,507 |
| 2008 | $1,581,301 | 345,019 | 378,056 |
| 2009 | $847,987 | 122,388 | 116,589 |
| 2010 | $441,363 | 23,109 | 26,905 |
Note: Quantity represents Number of pairs
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