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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $2,482,106 | 16 | 84,500 |
| 2006 | $3,549,068 | 24,577 | 48,771 |
| 2007 | $3,727,805 | 5 | 15,343 |
| 2008 | $4,582,644 | 2 | 7,287 |
| 2009 | $3,647,347 | 2 | 4,185 |
| 2010 | $2,704,892 | 0 | 6,323 |
| 2011 | $2,721,335 | 0 | 10,336 |
Note: Quantity represents Weight in carats
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