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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $200,000 | 12,571 | 28,644 |
| 2006 | $98,000 | 6,160 | 14,035 |
| 2007 | $811,000 | 48,246 | 122,732 |
| 2008 | $1,034,000 | 50,018 | 23,517 |
| 2009 | $196,000 | 8,077 | 18,178 |
| 2010 | $84,000 | 3,671 | 3,157 |
| 2011 | $527,000 | 26,650 | 52,515 |
Note: Quantity represents Number of pairs
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