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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $139,835,129 | 757 | 2,191,165 |
| 2006 | $122,017,900 | 486 | 2,431,565 |
| 2007 | $106,125,022 | 281 | 1,404,285 |
| 2008 | $192,586,630 | 2,715 | 13,574,176 |
| 2009 | $102,209,139 | 4,931 | 24,652,721 |
| 2010 | $75,548,184 | 81 | 407,100 |
| 2011 | $117,696,516 | 101 | 505,095 |
Note: Quantity represents Weight in carats
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