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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $89,152 | 15,588 | 62,419 |
| 2006 | $80,460 | 14,069 | 48,399 |
| 2007 | $152,187 | 26,098 | 70,328 |
| 2008 | $341,221 | 144,052 | 104,999 |
| 2009 | $2,897,647 | 401,641 | 746,030 |
| 2010 | $4,780,183 | 573,982 | 1,346,939 |
Note: Quantity represents Number of pairs
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