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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,845,335 | 584 | 83,817 |
| 2006 | $1,737,477 | 2,755 | 65,345 |
| 2007 | $1,623,431 | 0 | 162,312 |
| 2008 | $1,486,762 | 0 | 205,006 |
| 2009 | $471,518 | 19 | 31,646 |
| 2010 | $1,348,248 | 50 | 36,732 |
| 2011 | $3,118,018 | 96 | 68,001 |
Note: Quantity represents Weight in carats
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