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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $58,643 | 4,580 | 8,176 |
| 2006 | $493,512 | 38,539 | 49,227 |
| 2007 | $1,415,025 | 95,208 | 244,418 |
| 2008 | $2,073,848 | 141,027 | 87,838 |
| 2009 | $1,261,023 | 78,301 | 292,518 |
| 2010 | $2,122,868 | 117,483 | 138,905 |
| 2011 | $1,055,545 | 55,910 | 67,192 |
Note: Quantity represents Number of pairs
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