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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $351,849,206 | 0 | 592,529 |
| 2006 | $462,773,574 | 0 | 608,666 |
| 2007 | $464,360,439 | 0 | 582,512 |
| 2008 | $531,047,612 | 0 | 577,525 |
| 2009 | $336,022,296 | 0 | 363,180 |
| 2010 | $410,070,437 | 0 | 417,671 |
| 2011 | $409,206,568 | 0 | 332,972 |
Note: Quantity represents Weight in carats
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