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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $4,770 | 5,531 | 17,940 |
| 2006 | $6,637 | 7,080 | 28,320 |
| 2007 | $21,557 | 19,450 | 29,780 |
| 2008 | $2,633 | 3,440 | 8,223 |
| 2009 | $4,120 | 3,322 | 13,138 |
| 2010 | $71,523 | 54,920 | 188,070 |
| 2011 | $7,044 | 2,920 | 452 |
Note: Quantity represents Number of pairs
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