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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,617,101 | 21,298 | 41,234 |
| 2006 | $1,183,635 | 1,375 | 30,181 |
| 2007 | $1,801,554 | 8,557 | 19,065 |
| 2008 | $1,416,900 | 55 | 19,331 |
| 2009 | $382,927 | 2 | 2,514 |
| 2010 | $983,550 | 36 | 7,097 |
| 2011 | $1,502,748 | 45 | 7,440 |
Note: Quantity represents Weight in carats
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