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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $18,547,050 | 0 | 1,361,064 |
| 2006 | $7,147,938 | 0 | 95,689 |
| 2007 | $14,693,423 | 14 | 262,582 |
| 2008 | $11,292,384 | 12 | 87,481 |
| 2009 | $9,590,883 | 14 | 73,095 |
| 2010 | $9,389,985 | 0 | 50,873 |
| 2011 | $8,498,965 | 59 | 42,698 |
Note: Quantity represents Weight in carats
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