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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $110,204,370 | 0 | 511,770 |
| 2006 | $86,194,267 | 0 | 232,096 |
| 2007 | $39,404,818 | 0 | 172,800 |
| 2008 | $20,297,201 | 0 | 64,759 |
| 2009 | $13,683,166 | 0 | 290,335 |
| 2010 | $2,242,818 | 5 | 21,658 |
| 2011 | $8,096,466 | 0 | 150,405 |
Note: Quantity represents Weight in carats
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