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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $52,200 | 3,445 | 3,759 |
| 2006 | $107,031 | 5,217 | 4,276 |
| 2007 | $154,893 | 6,515 | 5,387 |
| 2008 | $87,228 | 3,992 | 2,730 |
| 2009 | $61,228 | 2,134 | 1,686 |
| 2010 | $79,118 | 2,106 | 1,552 |
| 2011 | $43,998 | 1,496 | 1,145 |
Note: Quantity represents Number of pairs
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