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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $336,000 | 18,969 | 25,106 |
| 2006 | $244,000 | 15,900 | 18,232 |
| 2007 | $260,000 | 21,900 | 10,216 |
| 2008 | $447,000 | 27,800 | 0 |
| 2009 | $67,000 | 3,248 | 2,231 |
| 2010 | $36,000 | 1,900 | 1,250 |
| 2011 | $602,000 | 57,800 | 20,978 |
Note: Quantity represents Number of pairs
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