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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $30,687,858 | 1,482 | 7,408,423 |
| 2006 | $29,281,982 | 1,460 | 7,301,832 |
| 2007 | $30,616,423 | 1,871 | 9,355,090 |
| 2008 | $24,627,833 | 1,293 | 6,465,000 |
| 2009 | $20,282,248 | 1,353 | 6,765,432 |
| 2010 | $22,507,440 | 0 | 0 |
| 2011 | $23,335,315 | 1,393 | 6,966,332 |
Note: Quantity represents Weight in carats
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