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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $60,417 | 7,423 | 4,092 |
| 2006 | $53,943 | 5,943 | 3,654 |
| 2007 | $35,513 | 2,803 | 1,662 |
| 2008 | $61,480 | 3,899 | 3,085 |
| 2009 | $99,502 | 6,563 | 4,113 |
| 2010 | $214,074 | 14,278 | 8,119 |
| 2011 | $396,998 | 17,235 | 19,368 |
Note: Quantity represents Number of pairs
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