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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $23,831,875 | 290 | 119,881 |
| 2006 | $21,218,234 | 223 | 95,271 |
| 2007 | $31,952,024 | 376 | 126,241 |
| 2008 | $26,692,290 | 393 | 136,383 |
| 2009 | $10,848,803 | 280 | 50,518 |
| 2010 | $26,524,455 | 567 | 131,118 |
| 2011 | $30,299,656 | 564 | 141,277 |
Note: Quantity represents Weight in carats
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