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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,901,343 | 322 | 500 |
| 2006 | $2,237,617 | 623 | 460 |
| 2007 | $4,375,519 | 4,857 | 24,285,000 |
| 2008 | $12,314,346 | 10,194 | 4,872 |
| 2009 | $2,479,400 | 1,800 | 204,108 |
| 2010 | $1,404,440 | 1,559 | 52,968 |
| 2011 | $1,339,807 | 2,132 | 2,800,613 |
Note: Quantity represents Weight in carats
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