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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $2,370,987 | 0 | 6,480 |
| 2006 | $17,268,657 | 12 | 68,916 |
| 2007 | $1,506,853 | 0 | 4,043 |
| 2008 | $2,617,626 | 6 | 22,291 |
| 2009 | $921,284 | 0 | 2,295 |
| 2010 | $5,529,510 | 0 | 1,935 |
| 2011 | $3,765,423 | 2 | 4,313 |
Note: Quantity represents Weight in carats
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