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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $94,911,198 | 0 | 1,185,284,406 |
| 2006 | $88,866,487 | 0 | 1,313,454,346 |
| 2007 | $66,401,424 | 0 | 1,446,889,507 |
| 2008 | $54,790,788 | 0 | 1,340,479,190 |
| 2009 | $43,890,917 | 0 | 1,162,798,756 |
| 2010 | $47,156,673 | 0 | 1,031,835,709 |
| 2011 | $64,186,853 | 0 | 1,670,594,229 |
Note: Quantity represents Weight in carats
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