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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $122,918,609 | 0 | 36,447,578 |
| 2006 | $135,884,832 | 0 | 19,151,292 |
| 2007 | $173,982,047 | 203 | 15,650,759 |
| 2008 | $252,150,517 | 0 | 19,236,630 |
| 2009 | $178,749,894 | 0 | 17,765,820 |
| 2010 | $228,806,779 | 0 | 22,659,995 |
| 2011 | $330,566,101 | 0 | 46,132,062 |
Note: Quantity represents Weight in carats
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