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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $507,290 | 39,078 | 111,336 |
| 2006 | $524,129 | 43,575 | 34,510 |
| 2007 | $674,228 | 51,605 | 28,694 |
| 2008 | $772,222 | 50,653 | 42,420 |
| 2009 | $1,275,155 | 101,628 | 82,210 |
| 2010 | $1,045,874 | 61,798 | 57,140 |
Note: Quantity represents Number of pairs
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