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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $2,672,137 | 0 | 1,931,563 |
| 2006 | $3,510,791 | 0 | 4,184,963 |
| 2007 | $4,607,965 | 5 | 8,357,302 |
| 2008 | $5,114,995 | 0 | 8,086,238 |
| 2009 | $1,386,795 | 0 | 1,357,890 |
| 2010 | $2,921,159 | 0 | 2,235,050 |
| 2011 | $2,891,107 | 0 | 2,035,331 |
Note: Quantity represents Weight in carats
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