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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $16,828 | 508 | 1,755 |
| 2006 | $148,123 | 4,471 | 26,726 |
| 2007 | $81,190 | 2,134 | 13,144 |
| 2008 | $229,442 | 5,707 | 10,261 |
| 2009 | $629,345 | 12,564 | 33,283 |
| 2010 | $420,735 | 7,999 | 11,676 |
| 2011 | $294,360 | 5,686 | 7,938 |
Note: Quantity represents Number of pairs
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