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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $252,176 | 1,177 | 5,323,715 |
| 2006 | $220,504 | 1,848 | 9,345,656 |
| 2007 | $424,978 | 990 | 4,769,340 |
| 2008 | $244,899 | 2,662 | 13,286,655 |
| 2009 | $138,749 | 2,620 | 13,040,801 |
| 2010 | $366,367 | 3,526 | 17,387,351 |
| 2011 | $335,371 | 1,782 | 6,809,335 |
Note: Quantity represents Weight in carats
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