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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $43,726 | 0 | 52,462 |
| 2006 | $31,941 | 17 | 0 |
| 2007 | $61,505 | 492 | 2,456,855 |
| 2008 | $65,065 | 571 | 2,919,445 |
| 2009 | $33,587 | 462 | 2,256,630 |
| 2010 | $14,318 | 204 | 1,013,670 |
| 2011 | $26,600 | 293 | 1,453,825 |
Note: Quantity represents Weight in carats
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