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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $12,773,734 | 134 | 18,275 |
| 2006 | $5,415,208 | 0 | 14,676 |
| 2007 | $6,891,605 | 0 | 14,249 |
| 2008 | $7,323,996 | 0 | 15,579 |
| 2009 | $2,756,725 | 0 | 9,122 |
| 2010 | $3,149,611 | 0 | 7,865 |
| 2011 | $5,987,526 | 0 | 0 |
Note: Quantity represents Weight in carats
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