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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,552,969 | 0 | 243,331 |
| 2006 | $1,231,003 | 0 | 59,214 |
| 2007 | $1,968,758 | 2 | 194,679 |
| 2008 | $1,783,836 | 0 | 102,714 |
| 2009 | $1,883,891 | 0 | 109,485 |
| 2010 | $2,394,050 | 0 | 199,689 |
| 2011 | $3,487,786 | 0 | 310,337 |
Note: Quantity represents Weight in carats
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