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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $215,506,492 | 300 | 88,644 |
| 2006 | $158,916,070 | 0 | 164,426 |
| 2007 | $172,219,208 | 69 | 226,443 |
| 2008 | $185,866,121 | 95 | 293,341 |
| 2009 | $179,888,416 | 0 | 394,221 |
| 2010 | $169,043,458 | 0 | 145,682 |
| 2011 | $196,293,656 | 0 | 129,943 |
Note: Quantity represents Weight in carats
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