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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $16,375,056 | 12,487 | 62,414,438 |
| 2006 | $13,749,351 | 11,644 | 0 |
| 2007 | $18,532,509 | 11,725 | 60,155,938 |
| 2008 | $23,227,456 | 20,964 | 104,825,666 |
| 2009 | $14,524,818 | 14,819 | 74,094,118 |
| 2010 | $19,020,721 | 21,620 | 108,110,746 |
| 2011 | $16,962,071 | 21,121 | 105,599,579 |
Note: Quantity represents Weight in carats
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