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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $770,196 | 721 | 4,042,100 |
| 2006 | $454,729 | 404 | 3,486,265 |
| 2007 | $445,093 | 1,362 | 3,149,550 |
| 2008 | $618,328 | 688 | 27,584,081 |
| 2009 | $307,010 | 52,429 | 263,119,707 |
| 2010 | $277,128 | 397 | 1,970,015 |
| 2011 | $437,421 | 42,533 | 213,172,115 |
Note: Quantity represents Weight in carats
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