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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $204,325 | 0 | 210,573 |
| 2006 | $231,275 | 0 | 265,855 |
| 2007 | $273,889 | 214 | 470,659 |
| 2008 | $353,739 | 262 | 593,586 |
| 2009 | $309,511 | 267 | 522,569 |
| 2010 | $438,408 | 433 | 768,602 |
| 2011 | $529,671 | 552 | 903,311 |
Note: Quantity represents Weight in carats
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