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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $83,728 | 14,640 | 42,559 |
| 2006 | $70,762 | 12,373 | 76,074 |
| 2007 | $171,106 | 29,328 | 105,357 |
| 2008 | $343,278 | 59,410 | 290,487 |
| 2009 | $619,241 | 85,833 | 692,321 |
| 2010 | $627,603 | 75,360 | 597,281 |
| 2011 | $517,711 | 82,474 | 490,577 |
Note: Quantity represents Number of pairs
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