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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $8,301,863 | 1,152 | 5,760,130 |
| 2006 | $5,658,134 | 836 | 4,180,000 |
| 2007 | $5,318,489 | 607 | 3,035,000 |
| 2008 | $4,546,163 | 249 | 1,245,000 |
| 2009 | $3,506,735 | 330 | 1,650,000 |
| 2010 | $4,125,220 | 0 | 0 |
| 2011 | $2,071,355 | 185 | 925,109 |
Note: Quantity represents Weight in carats
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