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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $29,950 | 39,414 | 66,887 |
| 2006 | $54,199 | 67,793 | 148,087 |
| 2007 | $53,469 | 95,283 | 202,904 |
| 2008 | $61,928 | 72,734 | 13,521 |
| 2009 | $69,148 | 97,622 | 12,928 |
| 2010 | $109,178 | 98,771 | 241,242 |
| 2011 | $177,429 | 150,733 | 489,422 |
Note: Quantity represents Number of pairs
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