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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $2,818,981 | 0 | 97,156 |
| 2006 | $5,488,736 | 0 | 46,120 |
| 2007 | $11,288,353 | 0 | 129,664 |
| 2008 | $13,740,929 | 0 | 262,975 |
| 2009 | $6,964,617 | 0 | 115,520 |
| 2010 | $4,059,821 | 0 | 366,588 |
| 2011 | $5,355,693 | 0 | 87,918 |
Note: Quantity represents Weight in carats
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