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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,149,719,635 | 35,909 | 12,039,040 |
| 2006 | $1,475,185,277 | 12,674 | 7,503,230 |
| 2007 | $1,507,314,722 | 17,288 | 973,433 |
| 2008 | $1,682,792,073 | 190,969 | 1,343,346 |
| 2009 | $1,075,809,556 | 32,816 | 868,406 |
| 2010 | $1,298,433,858 | 7,724 | 2,784,157 |
| 2011 | $1,557,569,941 | 7,391 | 18,303,531 |
Note: Quantity represents Weight in carats
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