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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $40,791,012 | 8 | 41,285 |
| 2006 | $8,416,335 | 2 | 8,052 |
| 2007 | $10,037,749 | 1 | 6,712 |
| 2008 | $51,487,628 | 13 | 64,953 |
| 2009 | $99,099,764 | 28 | 138,531 |
| 2010 | $14,741,492 | 4 | 22,176 |
| 2011 | $15,706,806 | 2 | 61,933,601 |
Note: Quantity represents Weight in carats
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