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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $23,509,701 | 0 | 36,670,295 |
| 2006 | $8,764,511 | 0 | 14,782,424 |
| 2007 | $14,892,957 | 18,748 | 23,331,069 |
| 2008 | $3,861,537 | 0 | 7,837,909 |
| 2009 | $147,578,626 | 101,405 | 14,534,116 |
| 2010 | $42,710,882 | 26,331 | 0 |
| 2011 | $88,487,122 | 83,550 | 30,371,073 |
Note: Quantity represents Weight in carats
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