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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $7,267,623 | 3,691 | 91,254 |
| 2006 | $9,808,002 | 13,362 | 273,490 |
| 2007 | $7,983,307 | 6,533 | 32,665,000 |
| 2008 | $7,628,795 | 1,951 | 10,893 |
| 2009 | $2,522,866 | 356 | 70,052 |
| 2010 | $1,998,324 | 878 | 67,329 |
| 2011 | $1,513,144 | 536 | 164,885 |
Note: Quantity represents Weight in carats
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