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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $47,775 | 8,315 | 32,971 |
| 2006 | $134,281 | 9,773 | 57,951 |
| 2007 | $153,640 | 12,808 | 65,545 |
| 2008 | $168,862 | 7,634 | 36,574 |
| 2009 | $242,320 | 11,580 | 29,173 |
| 2010 | $174,647 | 8,788 | 23,594 |
| 2011 | $159,763 | 7,661 | 15,805 |
Note: Quantity represents Number of pairs
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