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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $27,246 | 4,940 | 29,741 |
| 2006 | $23,988 | 3,004 | 18,797 |
| 2007 | $186,706 | 13,480 | 27,499 |
| 2008 | $65,073 | 5,464 | 21,537 |
| 2009 | $76,343 | 4,459 | 16,075 |
| 2010 | $50,846 | 2,721 | 11,733 |
| 2011 | $119,834 | 4,161 | 13,419 |
Note: Quantity represents Number of pairs
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