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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $203,196 | 32,956 | 36,421 |
| 2006 | $159,806 | 22,209 | 28,643 |
| 2007 | $133,064 | 15,840 | 19,287 |
| 2008 | $175,987 | 22,767 | 16,900 |
| 2009 | $49,752 | 6,244 | 4,662 |
| 2010 | $49,774 | 9,479 | 4,354 |
| 2011 | $496,346 | 185,415 | 51,803 |
Note: Quantity represents Number of pairs
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