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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,030,097 | 0 | 29,825 |
| 2006 | $710,601 | 0 | 344,169 |
| 2007 | $1,669,698 | 1,302 | 2,955 |
| 2008 | $895,976 | 664 | 1,700 |
| 2009 | $586,801 | 506 | 242,671 |
| 2010 | $1,007,166 | 995 | 217,924 |
| 2011 | $1,164,871 | 1,215 | 166 |
Note: Quantity represents Weight in carats
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