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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $11,258 | 7,300 | 1,876 |
| 2006 | $178,264 | 74,037 | 29,705 |
| 2007 | $111,780 | 17,939 | 14,247 |
| 2008 | $3,587 | 4,704 | 0 |
| 2009 | $44,009 | 7,989 | 2,614 |
| 2010 | $25,950 | 17,191 | 1,504 |
| 2011 | $220,239 | 88,792 | 12,779 |
Note: Quantity represents Number of pairs
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