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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $7,583,946 | 3,317 | 15,336,614 |
| 2006 | $3,727,224 | 29,850 | 1,756,381 |
| 2007 | $3,505,721 | 4,081 | 559,392 |
| 2008 | $3,059,550 | 666 | 521,375 |
| 2009 | $2,183,255 | 392 | 335,265 |
| 2010 | $2,065,883 | 1,023 | 4,025,106 |
| 2011 | $4,030,961 | 1,453 | 5,358,092 |
Note: Quantity represents Weight in carats
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