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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $72,304 | 61,911 | 2,804 |
| 2006 | $30,943 | 22,440 | 18,726 |
| 2007 | $103,868 | 5,930 | 4,208 |
| 2008 | $356,660 | 7,429 | 4,595 |
| 2009 | $391,999 | 10,492 | 7,010 |
| 2010 | $392,663 | 15,388 | 14,964 |
| 2011 | $112,341 | 7,251 | 5,852 |
Note: Quantity represents Number of pairs
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