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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $496,237 | 67,739 | 46,260 |
| 2006 | $456,667 | 63,783 | 42,678 |
| 2007 | $398,929 | 39,648 | 35,951 |
| 2008 | $358,368 | 32,653 | 28,210 |
| 2009 | $241,725 | 29,046 | 22,468 |
| 2010 | $304,445 | 33,299 | 20,638 |
| 2011 | $307,471 | 34,816 | 22,304 |
Note: Quantity represents Number of pairs
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