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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $2,536,849 | 0 | 20,340 |
| 2006 | $2,903,467 | 0 | 287,256 |
| 2007 | $2,424,608 | 0 | 634 |
| 2008 | $3,058,524 | 0 | 19,598 |
| 2009 | $3,665,391 | 0 | 334,520 |
| 2010 | $3,124,655 | 0 | 18,037 |
| 2011 | $7,924,919 | 0 | 1,229 |
Note: Quantity represents Weight in carats
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