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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $15,549,926 | 0 | 12,792,650 |
| 2006 | $18,394,225 | 0 | 37,797,348 |
| 2007 | $49,200,869 | 0 | 14,105,264 |
| 2008 | $53,360,717 | 0 | 12,592,599 |
| 2009 | $39,459,845 | 0 | 6,251,908 |
| 2010 | $8,720,751 | 0 | 5,353,528 |
| 2011 | $29,410,520 | 0 | 3,254,105 |
Note: Quantity represents Weight in carats
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