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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $26,000,209 | 15,150 | 195,180 |
| 2006 | $16,589,623 | 1,383 | 118,710 |
| 2007 | $1,500,625 | 2 | 8,634 |
| 2008 | $4,433,814 | 4 | 11,566 |
| 2009 | $3,824,334 | 5 | 4,498 |
| 2010 | $5,056,314 | 5 | 20,460 |
| 2011 | $4,132,345 | 0 | 3,263 |
Note: Quantity represents Weight in carats
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