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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $23,860 | 6,012 | 3,055 |
| 2006 | $5,363 | 31,670 | 470 |
| 2007 | $44,609 | 6,994 | 6,330 |
| 2008 | $241,079 | 16,394 | 40,999 |
| 2009 | $101,547 | 6,305 | 6,647 |
| 2010 | $143,110 | 28,148 | 27,486 |
| 2011 | $106,128 | 10,835 | 16,143 |
Note: Quantity represents Number of pairs
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