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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,824,262 | 49 | 2,755 |
| 2006 | $2,139,204 | 254 | 18,182 |
| 2007 | $6,117,303 | 187 | 5,837 |
| 2008 | $17,450,956 | 208 | 116,669 |
| 2009 | $11,796,203 | 215 | 7,306 |
| 2010 | $17,621,907 | 140 | 5,567 |
| 2011 | $25,671,726 | 70 | 6,848 |
Note: Quantity represents Weight in carats
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