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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $94,189,051 | 6,382,736 | 10,449,945 |
| 2006 | $113,660,493 | 7,711,450 | 12,282,612 |
| 2007 | $109,760,336 | 6,569,758 | 10,755,181 |
| 2008 | $138,137,773 | 8,022,602 | 13,071,065 |
| 2009 | $115,971,498 | 7,045,844 | 11,358,065 |
| 2010 | $143,411,813 | 8,525,202 | 13,936,776 |
| 2011 | $196,803,616 | 11,154,898 | 18,284,784 |
Note: Quantity represents Number of pairs
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