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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $2,296,415 | 3,666,818 | 5,166,518 |
| 2006 | $6,565,063 | 629 | 3,446,830 |
| 2007 | $8,499,595 | 556 | 3,301,385 |
| 2008 | $7,868,200 | 657 | 3,224,735 |
| 2009 | $2,899,863 | 20 | 100,265 |
| 2010 | $4,549,648 | 38 | 188,955 |
Note: Quantity represents Weight in carats
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