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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $6,967,426 | 1,660,837 | 897,551 |
| 2006 | $7,666,768 | 1,538,978 | 987,641 |
| 2007 | $9,681,188 | 1,578,440 | 1,214,554 |
| 2008 | $13,491,808 | 2,147,576 | 1,478,482 |
| 2009 | $12,565,982 | 1,842,885 | 1,229,894 |
Note: Quantity represents Number of pairs
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