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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $8,186,512 | 0 | 21,915 |
| 2006 | $6,131,664 | 0 | 175,112 |
| 2007 | $8,148,522 | 0 | 903 |
| 2008 | $3,320,233 | 0 | 16,208 |
| 2009 | $3,396,656 | 0 | 60,687 |
| 2010 | $3,219,616 | 0 | 120,046 |
| 2011 | $5,056,205 | 0 | 680 |
Note: Quantity represents Weight in carats
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