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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $276,531 | 55 | 275,000 |
| 2006 | $252,808 | 55 | 0 |
| 2007 | $231,561 | 73 | 365,000 |
| 2008 | $348,709 | 65 | 325,000 |
| 2009 | $385,842 | 62 | 310,000 |
| 2010 | $340,348 | 147 | 735,000 |
| 2011 | $467,651 | 57 | 285,000 |
Note: Quantity represents Weight in carats
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