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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $52,272 | 105,423 | 3,222,752 |
| 2006 | $48,252 | 81,729 | 408,644,560 |
| 2007 | $37,207 | 38,215 | 212,430 |
| 2008 | $55,938 | 45,236 | 700,497 |
| 2009 | $127,627 | 109,362 | 86,255,845 |
| 2010 | $220,051 | 25,916 | 79,726,164 |
| 2011 | $69,195 | 10,059 | 14,836,172 |
Note: Quantity represents Weight in carats
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