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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $7,133,646 | 20,438 | 98,435,345 |
| 2006 | $7,305,128 | 21,872 | 106,240,988 |
| 2007 | $8,714,919 | 22,669 | 112,309,725 |
| 2008 | $6,659,030 | 15,021 | 75,019,205 |
| 2009 | $1,787,345 | 4,109 | 20,540,550 |
| 2010 | $1,965,312 | 5,803 | 29,004,870 |
| 2011 | $1,431,461 | 9,349 | 46,740,130 |
Note: Quantity represents Weight in carats
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