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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $67,410,000 | 4,436,461 | 6,732,571 |
| 2006 | $71,232,000 | 3,462,586 | 7,114,293 |
| 2007 | $68,759,000 | 4,622,438 | 5,338,674 |
| 2008 | $81,876,000 | 3,881,842 | 5,967,400 |
| 2009 | $69,608,000 | 2,837,363 | 4,657,795 |
| 2010 | $94,290,325 | 3,229,891 | 5,747,878 |
| 2011 | $118,304,348 | 3,691,762 | 7,259,261 |
Note: Quantity represents Number of pairs
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