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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $8,186 | 1,000 | 378 |
| 2006 | $44,572 | 2,183 | 2,356 |
| 2007 | $212,962 | 24,498 | 15,729 |
| 2008 | $260,554 | 36,687 | 24,776 |
| 2009 | $132,176 | 14,655 | 6,769 |
| 2010 | $149,716 | 25,743 | 8,310 |
| 2011 | $251,669 | 40,632 | 13,036 |
Note: Quantity represents Number of pairs
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