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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $54,945,436 | 28,012 | 141,433,010 |
| 2006 | $50,961,829 | 30,962 | 160,140,116 |
| 2007 | $53,623,587 | 39,413 | 201,922,844 |
| 2008 | $43,239,568 | 33,344 | 168,045,721 |
| 2009 | $25,444,584 | 26,572 | 134,479,607 |
| 2010 | $33,145,504 | 42,363 | 215,702,527 |
| 2011 | $37,447,250 | 53,322 | 267,834,772 |
Note: Quantity represents Weight in carats
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