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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,496,990 | 0 | 540,433 |
| 2006 | $2,065,981 | 0 | 11,125,783 |
| 2007 | $2,113,139 | 0 | 8,061,584 |
| 2008 | $1,753,946 | 0 | 12,717,952 |
| 2009 | $1,166,956 | 0 | 1,359,746 |
| 2010 | $1,431,502 | 0 | 342,528 |
| 2011 | $1,781,350 | 0 | 508,270 |
Note: Quantity represents Weight in carats
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