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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $69,977,301 | 114 | 570,400 |
| 2006 | $88,049,250 | 135 | 672,800 |
| 2007 | $125,041,032 | 373 | 1,867,250 |
| 2008 | $152,912,897 | 139 | 697,450 |
| 2009 | $87,862,637 | 580 | 2,898,450 |
| 2010 | $108,003,064 | 115 | 572,900 |
| 2011 | $128,434,769 | 172 | 389,334 |
Note: Quantity represents Weight in carats
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