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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,769,733 | 0 | 1,778,442 |
| 2006 | $1,984,371 | 0 | 3,135,858 |
| 2007 | $1,374,803 | 1,072 | 2,578,142 |
| 2008 | $1,260,460 | 934 | 1,280,547 |
| 2009 | $638,567 | 551 | 433,856 |
| 2010 | $1,115,666 | 1,102 | 1,209,433 |
| 2011 | $1,070,035 | 975 | 378,246 |
Note: Quantity represents Weight in carats
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