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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $2,665,431 | 5 | 8,016 |
| 2006 | $3,568,667 | 19 | 8,080 |
| 2007 | $7,383,993 | 346 | 15,889 |
| 2008 | $8,683,526 | 2,195 | 18,499 |
| 2009 | $3,928,953 | 8 | 6,416 |
| 2010 | $3,288,538 | 14 | 12,207 |
| 2011 | $5,577,995 | 0 | 6,227 |
Note: Quantity represents Weight in carats
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