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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $7,497 | 28 | 140,000 |
| 2006 | $162,048 | 352 | 1,760,000 |
| 2007 | $15,569 | 158 | 790,000 |
| 2008 | $135,790 | 65 | 323,777 |
| 2009 | $30,497 | 117 | 585,000 |
| 2010 | $32,105 | 16 | 79,250 |
| 2011 | $90,253 | 323 | 1,616,900 |
Note: Quantity represents Weight in carats
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