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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,570,411 | 0 | 159,497 |
| 2006 | $2,470,078 | 0 | 202,185 |
| 2007 | $2,363,929 | 0 | 303,018 |
| 2008 | $1,941,177 | 0 | 243,450 |
| 2009 | $1,473,894 | 60 | 161,226 |
| 2010 | $1,985,731 | 73 | 294,472 |
| 2011 | $2,507,662 | 76 | 388,536 |
Note: Quantity represents Weight in carats
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