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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $2,670,834 | 15,100 | 78,075,114 |
| 2006 | $3,600,803 | 36,073 | 201,528,343 |
| 2007 | $3,396,619 | 43,035 | 196,429,576 |
| 2008 | $3,274,951 | 44,645 | 214,353,466 |
| 2009 | $2,933,212 | 48,761 | 188,230,252 |
| 2010 | $2,923,358 | 27,675 | 137,954,899 |
| 2011 | $1,642,581 | 16,436 | 80,067,271 |
Note: Quantity represents Weight in carats
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