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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $15,592,372 | 0 | 551,573 |
| 2006 | $20,492,721 | 0 | 555,478 |
| 2007 | $25,118,772 | 0 | 767,163 |
| 2008 | $17,060,980 | 0 | 0 |
| 2009 | $16,114,012 | 0 | 350,207 |
| 2010 | $9,291,781 | 0 | 239,188 |
| 2011 | $8,325,193 | 0 | 211,794 |
Note: Quantity represents Weight in carats
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