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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $232,757 | 46,583 | 81,222 |
| 2006 | $288,886 | 3 | 46,913 |
| 2007 | $245,541 | 43,775 | 44,751 |
| 2008 | $514,812 | 0 | 219,109 |
| 2009 | $188,108 | 0 | 41,655 |
| 2010 | $102,928 | 0 | 7,458 |
| 2011 | $116,893 | 0 | 1,806 |
Note: Quantity represents Weight in carats
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