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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $42,003,682 | 14 | 70,584 |
| 2006 | $27,415,424 | 9 | 43,991 |
| 2007 | $19,796,173 | 7 | 32,461 |
| 2008 | $13,160,950 | 3 | 16,131 |
| 2009 | $7,288,193 | 1 | 4,267 |
| 2010 | $3,038,476 | 0 | 3,413 |
| 2011 | $6,509,086 | 2 | 9,778 |
Note: Quantity represents Weight in carats
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