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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $95,746 | 7,877 | 3,648 |
| 2006 | $101,226 | 9,045 | 5,730 |
| 2007 | $177,954 | 11,247 | 6,457 |
| 2008 | $279,585 | 13,543 | 6,277 |
| 2009 | $189,295 | 10,845 | 4,789 |
| 2010 | $203,755 | 12,267 | 5,416 |
| 2011 | $175,289 | 10,771 | 4,920 |
Note: Quantity represents Number of pairs
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