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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $2,005,622 | 9,761 | 49,139,151 |
| 2006 | $1,318,010 | 3,563 | 18,028,081 |
| 2007 | $1,680,245 | 13,152 | 66,016,904 |
| 2008 | $358,142 | 2,073 | 10,384,560 |
| 2009 | $156,501 | 308 | 1,550,895 |
| 2010 | $490,281 | 3,008 | 15,054,770 |
| 2011 | $1,024,491 | 3,189 | 15,973,656 |
Note: Quantity represents Weight in carats
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