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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,227,000 | 178,892 | 204,462 |
| 2006 | $1,064,000 | 192,681 | 177,300 |
| 2007 | $985,000 | 522,886 | 125,547 |
| 2008 | $1,038,000 | 255,387 | 0 |
| 2009 | $715,000 | 103,088 | 42,475 |
| 2010 | $1,152,000 | 133,949 | 66,772 |
| 2011 | $889,000 | 92,404 | 51,581 |
Note: Quantity represents Number of pairs
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