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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $2,519,797 | 923 | 4,617,395 |
| 2006 | $3,401,530 | 316 | 1,581,805 |
| 2007 | $2,529,301 | 224 | 1,120,000 |
| 2008 | $1,181,207 | 973 | 4,865,907 |
| 2009 | $1,037,688 | 1,059 | 5,296,155 |
| 2010 | $2,261,051 | 0 | 0 |
| 2011 | $2,220,497 | 1,420 | 7,097,550 |
Note: Quantity represents Weight in carats
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