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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $8,327,898 | 0 | 14,149,353 |
| 2006 | $7,287,686 | 0 | 14,272,978 |
| 2007 | $7,398,337 | 9,313 | 16,829,557 |
| 2008 | $5,252,608 | 0 | 31,318,228 |
| 2009 | $4,041,186 | 2,777 | 13,464,308 |
| 2010 | $6,570,410 | 4,051 | 16,481,065 |
| 2011 | $7,747,260 | 7,315 | 18,397,227 |
Note: Quantity represents Weight in carats
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