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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $55,535,020 | 128,346 | 119,462 |
| 2006 | $117,895,201 | 44,021 | 105,514 |
| 2007 | $130,191,275 | 52 | 131,034 |
| 2008 | $121,749,115 | 62 | 149,203 |
| 2009 | $81,978,970 | 17 | 155,195 |
| 2010 | $105,227,423 | 20 | 243,170 |
| 2011 | $124,366,365 | 25 | 179,487 |
Note: Quantity represents Weight in carats
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