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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,576,347 | 19 | 4,767 |
| 2006 | $678,842 | 17 | 6,281 |
| 2007 | $1,711,156 | 41 | 5,959 |
| 2008 | $4,606,744 | 88 | 11,545 |
| 2009 | $3,027,598 | 391 | 6,134 |
| 2010 | $1,955,443 | 389 | 5,294 |
| 2011 | $2,970,690 | 40 | 6,738 |
Note: Quantity represents Weight in carats
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