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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $187,665 | 0 | 670,101 |
| 2006 | $201,946 | 0 | 0 |
| 2007 | $205,653 | 160 | 422,221 |
| 2008 | $230,604 | 171 | 593,163 |
| 2009 | $212,892 | 184 | 706,593 |
| 2010 | $200,409 | 198 | 613,493 |
| 2011 | $421,026 | 439 | 1,729,422 |
Note: Quantity represents Weight in carats
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