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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,239,551 | 287,786 | 787,686 |
| 2006 | $1,441,339 | 388 | 1,252,498 |
| 2007 | $1,629,201 | 221,355 | 1,046,506 |
| 2008 | $786,950 | 279,347 | 497,834 |
| 2009 | $459,048 | 205 | 535,625 |
| 2010 | $269,428 | 140 | 346,773 |
Note: Quantity represents Weight in carats
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