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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $5,764,717 | 66,543 | 263,542 |
| 2006 | $5,731,576 | 0 | 45,393 |
| 2007 | $6,041,856 | 0 | 32,997 |
| 2008 | $5,611,050 | 0 | 18,648 |
| 2009 | $5,227,045 | 0 | 15,326 |
| 2010 | $4,502,644 | 0 | 9,402 |
| 2011 | $5,798,070 | 0 | 10,015 |
Note: Quantity represents Weight in carats
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