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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $377,736 | 97,311 | 29,246 |
| 2006 | $506,053 | 138,982 | 39,181 |
| 2007 | $766,652 | 261,017 | 53,479 |
| 2008 | $617,344 | 229,460 | 35,284 |
| 2009 | $634,425 | 208,623 | 0 |
| 2010 | $129,612 | 34,045 | 6,758 |
| 2011 | $128,103 | 44,272 | 6,424 |
Note: Quantity represents Number of pairs
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