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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $6,095,724 | 4,146 | 14,960,386 |
| 2006 | $6,771,801 | 5,487 | 27,445,912 |
| 2007 | $11,043,863 | 4,737 | 22,777,076 |
| 2008 | $14,666,913 | 4,535 | 21,419,896 |
| 2009 | $15,031,825 | 3,889 | 19,100,141 |
| 2010 | $3,718,871 | 1,186 | 5,786,767 |
| 2011 | $3,219,478 | 1,295 | 6,471,885 |
Note: Quantity represents Weight in carats
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