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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $6,736,943 | 2,695 | 13,888,958 |
| 2006 | $4,445,560 | 38,969 | 1,768,061 |
| 2007 | $1,965,675 | 2,596 | 513,952 |
| 2008 | $2,865,610 | 516 | 558,268 |
| 2009 | $3,160,528 | 302 | 626,062 |
| 2010 | $5,233,257 | 814 | 2,346,631 |
| 2011 | $5,116,899 | 61,313 | 2,259,758 |
Note: Quantity represents Weight in carats
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