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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $9,978,629 | 0 | 51,840,847 |
| 2006 | $10,161,442 | 0 | 56,747,895 |
| 2007 | $8,940,773 | 6,973 | 69,341,604 |
| 2008 | $7,210,058 | 5,345 | 69,194,799 |
| 2009 | $7,898,966 | 6,812 | 88,677,854 |
| 2010 | $10,194,127 | 10,072 | 149,344,243 |
| 2011 | $16,001,043 | 16,685 | 161,439,570 |
Note: Quantity represents Weight in carats
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