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| Year | Trade Value | Weight (kg) | Quantity |
| 2006 | $5,226,525 | 10 | 50,000 |
| 2007 | $40,817,217 | 183 | 915,000 |
| 2008 | $43,084,049 | 119 | 595,000 |
| 2009 | $57,770,991 | 94 | 470,000 |
| 2010 | $78,058,778 | 89 | 445,000 |
| 2011 | $178,552,660 | 201 | 1,005,000 |
Note: Quantity represents Weight in carats
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