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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $264,310,932 | 0 | 298,506 |
| 2006 | $283,863,035 | 0 | 287,325 |
| 2007 | $339,104,656 | 0 | 283,898 |
| 2008 | $355,065,426 | 0 | 259,636 |
| 2009 | $323,956,548 | 0 | 240,121 |
| 2010 | $374,694,518 | 0 | 249,125 |
| 2011 | $392,258,592 | 10,065 | 220,771 |
Note: Quantity represents Weight in carats
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