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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,748,598 | 0 | 13,752 |
| 2006 | $2,251,663 | 0 | 36,846 |
| 2007 | $1,182,785 | 89 | 6,840 |
| 2008 | $845,454 | 42 | 15,241 |
| 2009 | $1,404,965 | 71 | 23,743 |
| 2010 | $856,921 | 0 | 15,234 |
| 2011 | $618,219 | 31 | 8,327 |
Note: Quantity represents Weight in carats
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