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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $5,065,497 | 0 | 50,856 |
| 2006 | $3,726,749 | 0 | 49,619 |
| 2007 | $7,863,678 | 0 | 54,427 |
| 2008 | $6,706,187 | 0 | 31,806 |
| 2009 | $4,382,401 | 0 | 28,505 |
| 2010 | $4,162,567 | 0 | 55,626 |
| 2011 | $4,155,396 | 0 | 239,175 |
Note: Quantity represents Weight in carats
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