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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,542,729 | 136 | 690,105 |
| 2006 | $2,320,036 | 83 | 0 |
| 2007 | $642,875 | 53 | 267,480 |
| 2008 | $1,112,504 | 41 | 205,590 |
| 2009 | $398,995 | 13 | 68,660 |
| 2010 | $489,212 | 3 | 15,175 |
| 2011 | $314,651 | 20 | 98,845 |
Note: Quantity represents Weight in carats
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