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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $40,382 | 7,755 | 21,160,672 |
| 2006 | $22,664 | 10,752 | 53,758,835 |
| 2007 | $4,220 | 374 | 285 |
| 2008 | $39,929 | 18,995 | 9,874,550 |
| 2009 | $34,307 | 8,251 | 26,866 |
| 2010 | $11,301 | 2,615 | 17 |
| 2011 | $23,201 | 2,844 | 8,721,360 |
Note: Quantity represents Weight in carats
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