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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,925,000 | 136,401 | 168,667 |
| 2006 | $976,772 | 57,469 | 85,584 |
| 2007 | $942,780 | 100,705 | 81,241 |
| 2008 | $1,523,095 | 111,093 | 112,096 |
| 2009 | $2,671,596 | 174,252 | 174,867 |
| 2010 | $2,561,341 | 154,607 | 167,596 |
| 2011 | $3,352,649 | 193,123 | 213,418 |
Note: Quantity represents Number of pairs
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