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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $9,423 | 4,478 | 1,094 |
| 2006 | $41,234 | 36,816 | 4,786 |
| 2007 | $57,548 | 10,677 | 7,696 |
| 2008 | $45,332 | 20,151 | 4,921 |
| 2009 | $45,275 | 6,106 | 4,477 |
| 2010 | $42,348 | 4,557 | 4,045 |
| 2011 | $53,849 | 2,320 | 5,448 |
Note: Quantity represents Number of pairs
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