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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $5,902,670 | 339,820 | 838,188 |
| 2006 | $4,241,757 | 181,131 | 483,368 |
| 2007 | $9,350,868 | 358,827 | 763,929 |
| 2008 | $15,242,004 | 464,857 | 798,038 |
| 2009 | $25,945,452 | 563,281 | 4,300,332 |
| 2010 | $26,419,260 | 742,831 | 3,017,106 |
| 2011 | $28,420,497 | 820,976 | 4,017,235 |
Note: Quantity represents Number of pairs
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