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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $7,813,951 | 4,052 | 16,716,491 |
| 2006 | $8,511,792 | 6,257 | 27,081,901 |
| 2007 | $10,153,488 | 6,905 | 34,736,431 |
| 2008 | $19,356,065 | 4,247 | 21,454,696 |
| 2009 | $14,262,319 | 3,328 | 16,803,976 |
| 2010 | $9,473,415 | 4,010 | 20,422,801 |
| 2011 | $10,648,120 | 22,331 | 111,773,696 |
Note: Quantity represents Weight in carats
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