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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $5,651,322 | 15,680,825 | 367,110,525 |
| 2006 | $7,445,065 | 88,730 | 453,169,735 |
| 2007 | $7,280,534 | 57,137 | 276,723,853 |
| 2008 | $8,154,597 | 93,563 | 471,499,447 |
| 2009 | $5,355,884 | 62,681 | 300,806,382 |
| 2010 | $5,317,711 | 106,312 | 529,008,060 |
Note: Quantity represents Weight in carats
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