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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $26,070,091 | 0 | 1,425,801 |
| 2006 | $26,852,140 | 0 | 1,562,655 |
| 2007 | $32,399,007 | 2,431 | 2,122,548 |
| 2008 | $27,938,867 | 1,373 | 0 |
| 2009 | $17,496,274 | 890 | 947,463 |
| 2010 | $23,399,347 | 0 | 1,082,954 |
| 2011 | $32,127,742 | 1,620 | 1,262,252 |
Note: Quantity represents Weight in carats
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