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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $134,838,699 | 0 | 215,485 |
| 2006 | $193,368,160 | 0 | 1,126,168 |
| 2007 | $210,256,386 | 84 | 383,159 |
| 2008 | $292,063,111 | 150 | 616,973 |
| 2009 | $208,881,903 | 0 | 422,361 |
| 2010 | $271,320,024 | 0 | 415,219 |
| 2011 | $288,463,450 | 0 | 179,210 |
Note: Quantity represents Weight in carats
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