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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $149,418,421 | 0 | 153,731 |
| 2006 | $187,913,661 | 0 | 181,300 |
| 2007 | $193,424,577 | 77 | 172,999 |
| 2008 | $249,109,459 | 128 | 0 |
| 2009 | $178,742,303 | 0 | 109,264 |
| 2010 | $224,186,235 | 0 | 165,122 |
| 2011 | $234,708,172 | 0 | 187,962 |
Note: Quantity represents Weight in carats
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