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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $54,490 | 4,474 | 22,370,000 |
| 2006 | $31,299 | 2,200 | 11,000,000 |
| 2007 | $57,226 | 6,646 | 33,230,000 |
| 2008 | $90,872 | 11,045 | 55,225,000 |
| 2009 | $17,820 | 34 | 170,500 |
| 2010 | $118,945 | 12 | 61,382 |
| 2011 | $86,302 | 0 | 0 |
Note: Quantity represents Weight in carats
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