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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $43,034,912 | 0 | 427,205 |
| 2006 | $83,996,287 | 0 | 970,017 |
| 2007 | $76,700,380 | 101 | 547,343 |
| 2008 | $75,962,462 | 159 | 864,276 |
| 2009 | $67,793,397 | 118 | 757,270 |
| 2010 | $84,893,994 | 122 | 917,033 |
| 2011 | $95,400,670 | 112 | 607,297 |
Note: Quantity represents Weight in carats
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