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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $261,291 | 255 | 1,273,515 |
| 2006 | $301,282 | 214 | 1,069,100 |
| 2007 | $211,319 | 86 | 428,165 |
| 2008 | $315,675 | 168 | 838,620 |
| 2009 | $243,132 | 188 | 940,610 |
| 2010 | $554,084 | 322 | 1,609,470 |
| 2011 | $1,530,435 | 1,754 | 8,768,911 |
Note: Quantity represents Weight in carats
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