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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $11,322,777 | 0 | 218,590 |
| 2006 | $13,516,911 | 0 | 269,209 |
| 2007 | $14,936,953 | 0 | 260,929 |
| 2008 | $14,180,771 | 0 | 305,630 |
| 2009 | $8,273,494 | 335 | 177,511 |
| 2010 | $12,099,117 | 446 | 234,265 |
| 2011 | $15,467,875 | 466 | 212,514 |
Note: Quantity represents Weight in carats
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