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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $278,602 | 5,225 | 73,251 |
| 2006 | $723,596 | 3 | 21,249 |
| 2007 | $1,089,182 | 12 | 108,699 |
| 2008 | $1,697,969 | 115,400 | 82,703 |
| 2009 | $434,175 | 12 | 28,249 |
| 2010 | $233,009 | 14 | 14,098 |
| 2011 | $387,691 | 26 | 33,283 |
Note: Quantity represents Weight in carats
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