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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $230,782 | 11 | 2,349 |
| 2006 | $193,102 | 0 | 1,142 |
| 2007 | $70,111 | 67,615 | 131,853 |
| 2008 | $76,543 | 61 | 218,572 |
| 2009 | $81,905 | 184 | 167,337 |
| 2010 | $146,176 | 279 | 28,163 |
| 2011 | $250,282 | 18 | 8,207 |
Note: Quantity represents Weight in carats
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