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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $434,422,667 | 149,003 | 872,180 |
| 2006 | $532,227,586 | 412,205 | 849,976 |
| 2007 | $612,367,723 | 0 | 1,100,560 |
| 2008 | $581,460,606 | 0 | 908,012 |
| 2009 | $320,141,669 | 0 | 621,989 |
| 2010 | $443,162,714 | 0 | 885,930 |
| 2011 | $594,851,661 | 0 | 817,007 |
Note: Quantity represents Weight in carats
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