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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $28,793 | 1,288 | 2,457,337 |
| 2006 | $5,726 | 714 | 6,380,682 |
| 2007 | $3,128 | 444 | 410 |
| 2008 | $11,594 | 560 | 215,844 |
| 2009 | $13,429 | 1,525 | 7,625,400 |
| 2010 | $12,244 | 149 | 733,596 |
| 2011 | $25,768 | 631 | 5,146,520 |
Note: Quantity represents Weight in carats
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