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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $89,475 | 6,092 | 8,504 |
| 2006 | $41,650 | 4,988 | 3,959 |
| 2007 | $40,440 | 4,674 | 3,918 |
| 2008 | $67,080 | 3,532 | 4,742 |
| 2009 | $11,225 | 1,444 | 671 |
| 2010 | $20,443 | 3,788 | 1,166 |
| 2011 | $35,545 | 8,222 | 1,126 |
Note: Quantity represents Number of pairs
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