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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $904,126 | 763 | 577 |
| 2006 | $1,495,385 | 828 | 740 |
| 2007 | $1,590,201 | 873 | 4,365,000 |
| 2008 | $1,042,333 | 648 | 484 |
| 2009 | $619,614 | 377 | 278 |
| 2010 | $418,411 | 313 | 235 |
| 2011 | $558,344 | 324 | 211,594 |
Note: Quantity represents Weight in carats
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