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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,593,141 | 0 | 6,658 |
| 2006 | $2,706,171 | 0 | 856,541 |
| 2007 | $2,331,435 | 0 | 707 |
| 2008 | $3,448,187 | 0 | 690,441 |
| 2009 | $2,845,659 | 0 | 575,450 |
| 2010 | $4,359,712 | 0 | 336,857 |
| 2011 | $3,245,108 | 0 | 322 |
Note: Quantity represents Weight in carats
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