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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $35,688,326 | 0 | 4,983 |
| 2006 | $31,443,321 | 0 | 1,463 |
| 2007 | $32,440,181 | 31 | 2,378 |
| 2008 | $29,306,719 | 31 | 2,899 |
| 2009 | $25,540,115 | 36 | 90,838 |
| 2010 | $42,698,192 | 0 | 0 |
| 2011 | $48,995,656 | 0 | 51,596 |
Note: Quantity represents Weight in carats
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