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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $7,669,000 | 1,238,854 | 987,929 |
| 2006 | $10,068,000 | 829,813 | 1,296,971 |
| 2007 | $11,311,000 | 956,838 | 1,419,022 |
| 2008 | $17,824,000 | 1,424,538 | 1,953,220 |
| 2009 | $18,180,000 | 1,262,408 | 1,779,366 |
| 2010 | $16,134,000 | 1,040,694 | 1,442,971 |
| 2011 | $26,871,000 | 1,643,822 | 2,243,430 |
Note: Quantity represents Number of pairs
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