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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $88,600 | 7,835 | 6,178 |
| 2006 | $385,331 | 34,797 | 26,869 |
| 2007 | $1,144,459 | 76,627 | 92,443 |
| 2008 | $447,167 | 26,056 | 23,916 |
| 2009 | $226,955 | 17,918 | 12,033 |
| 2010 | $1,553,349 | 172,779 | 70,016 |
| 2011 | $1,592,047 | 101,451 | 126,026 |
Note: Quantity represents Number of pairs
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