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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $44,649,831 | 0 | 163,068,526 |
| 2006 | $49,238,261 | 0 | 163,757,101 |
| 2007 | $46,282,538 | 36,094 | 166,581,249 |
| 2008 | $43,864,889 | 32,516 | 156,898,705 |
| 2009 | $25,757,356 | 22,213 | 103,435,653 |
| 2010 | $46,446,303 | 45,889 | 227,326,038 |
| 2011 | $48,634,584 | 50,712 | 220,688,002 |
Note: Quantity represents Weight in carats
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