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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $70,438 | 4,406 | 2,669 |
| 2006 | $45,289 | 2,833 | 1,716 |
| 2007 | $115,650 | 8,178 | 4,922 |
| 2008 | $157,826 | 10,527 | 6,586 |
| 2009 | $569,395 | 34,761 | 21,651 |
| 2010 | $329,087 | 22,950 | 12,574 |
| 2011 | $867,000 | 60,382 | 55,229 |
Note: Quantity represents Number of pairs
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