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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $241,222 | 6,093 | 40,896 |
| 2006 | $601,576 | 21,128 | 35,900 |
| 2007 | $1,941,145 | 147,230 | 127,421 |
| 2008 | $2,451,352 | 212,804 | 364,690 |
| 2009 | $2,446,297 | 191,759 | 414,360 |
| 2010 | $3,970,082 | 195,753 | 656,210 |
Note: Quantity represents Number of pairs
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