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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $3,169,163 | 1,983 | 10,013,030 |
| 2006 | $3,222,991 | 2,007 | 10,037,456 |
| 2007 | $3,045,633 | 1,797 | 8,984,745 |
| 2008 | $3,328,614 | 2,788 | 13,938,146 |
| 2009 | $2,242,938 | 1,863 | 9,314,960 |
| 2010 | $3,087,035 | 2,503 | 12,512,821 |
| 2011 | $3,086,182 | 4,434 | 22,167,841 |
Note: Quantity represents Weight in carats
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