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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $238,160 | 87 | 396,600 |
| 2006 | $299,002 | 113 | 563,920 |
| 2007 | $595,733 | 255 | 1,148,089 |
| 2008 | $582,689 | 253 | 1,069,513 |
| 2009 | $489,194 | 195 | 840,852 |
| 2010 | $1,122,929 | 398 | 1,952,254 |
| 2011 | $1,418,387 | 595 | 2,566,750 |
Note: Quantity represents Weight in carats
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