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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $81,904 | 6,448 | 10,551 |
| 2006 | $40,119 | 3,159 | 5,168 |
| 2007 | $16,321 | 11,047 | 2,047 |
| 2008 | $22,926 | 39,627 | 2,512 |
| 2009 | $27,745 | 1,585 | 100 |
| 2010 | $16,809 | 29,349 | 1,503 |
| 2011 | $7,574 | 23,476 | 2,439 |
Note: Quantity represents Number of pairs
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