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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $25,108 | 9,986 | 49,928,516 |
| 2006 | $3,012 | 409,399 | 5,348,411 |
| 2007 | $1,856 | 158 | 0 |
| 2008 | $33,929 | 3,976 | 19,880,000 |
| 2009 | $71,142 | 6,747 | 33,735,000 |
| 2010 | $2,016 | 1,323 | 6,615,100 |
| 2011 | $12,266 | 934 | 4,671,500 |
Note: Quantity represents Weight in carats
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