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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $29,326,165 | 2,289,747 | 2,920,623 |
| 2006 | $44,803,248 | 3,649,117 | 4,405,226 |
| 2007 | $36,578,300 | 2,912,028 | 3,407,879 |
| 2008 | $42,171,613 | 3,230,510 | 3,695,065 |
| 2009 | $35,848,071 | 2,605,514 | 3,024,588 |
| 2010 | $49,750,576 | 3,576,585 | 4,203,745 |
| 2011 | $79,638,303 | 5,488,483 | 6,509,616 |
Note: Quantity represents Number of pairs
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