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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $192,568 | 105,352 | 6,183 |
| 2006 | $42,780 | 18,678 | 1,374 |
| 2007 | $12,997 | 522 | 290 |
| 2008 | $21,149 | 1,184 | 488 |
| 2009 | $66,780 | 2,216 | 1,274 |
| 2010 | $94,095 | 5,193 | 1,894 |
| 2011 | $266,417 | 12,662 | 5,258 |
Note: Quantity represents Number of pairs
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