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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $47,518,592 | 393 | 1,898,700 |
| 2006 | $76,005,749 | 211 | 829,570 |
| 2007 | $79,916,399 | 754 | 3,999,920 |
| 2008 | $111,732,085 | 303 | 1,749,570 |
| 2009 | $46,914,873 | 254 | 1,379,515 |
| 2010 | $64,173,227 | 352 | 2,021,730 |
| 2011 | $108,816,382 | 474 | 2,667,465 |
Note: Quantity represents Weight in carats
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