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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $265,005 | 46,681 | 91,774,438 |
| 2006 | $427,787 | 91,079 | 267,749,748 |
| 2007 | $278,024 | 34,939 | 134,832,116 |
| 2008 | $304,854 | 17,430 | 67,645,941 |
| 2009 | $682,638 | 94,115 | 312,376,092 |
| 2010 | $670,579 | 59,526 | 297,627,780 |
| 2011 | $1,007,399 | 45,854 | 178,119,727 |
Note: Quantity represents Weight in carats
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