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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $865,955 | 0 | 94,905 |
| 2006 | $239,385 | 0 | 62,329 |
| 2007 | $699,116 | 0 | 163,949 |
| 2008 | $511,263 | 0 | 147,994 |
| 2009 | $520,532 | 21 | 181,259 |
| 2010 | $965,558 | 36 | 162,506 |
| 2011 | $1,579,291 | 48 | 146,094 |
Note: Quantity represents Weight in carats
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