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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $217,878 | 252,081 | 472,037 |
| 2006 | $208,676 | 0 | 0 |
| 2007 | $198,208 | 110 | 550,000 |
| 2008 | $100,021 | 73 | 365,000 |
| 2009 | $95,599 | 114 | 570,000 |
| 2010 | $67,597 | 39 | 195,000 |
| 2011 | $152,037 | 66 | 330,000 |
Note: Quantity represents Weight in carats
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