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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $28,942,679 | 6,485 | 195,614 |
| 2006 | $18,486,606 | 5,957 | 119,619 |
| 2007 | $953,959 | 1 | 4,360 |
| 2008 | $2,398,709 | 2 | 7,888 |
| 2009 | $439,573 | 1 | 1,230 |
| 2010 | $2,761,576 | 4 | 14,892 |
| 2011 | $3,756,759 | 4 | 3,628 |
Note: Quantity represents Weight in carats
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