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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $380,550,626 | 0 | 1,554,250 |
| 2006 | $443,119,667 | 0 | 2,257,456 |
| 2007 | $490,993,892 | 645 | 1,788,327 |
| 2008 | $389,731,358 | 817 | 0 |
| 2009 | $236,081,284 | 411 | 1,002,705 |
| 2010 | $340,800,902 | 490 | 1,063,782 |
| 2011 | $423,830,662 | 499 | 1,059,401 |
Note: Quantity represents Weight in carats
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