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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $195,275,842 | 0 | 963,706 |
| 2006 | $206,743,552 | 0 | 764,221 |
| 2007 | $186,183,187 | 177 | 585,352 |
| 2008 | $289,723,797 | 307 | 720,127 |
| 2009 | $223,377,828 | 316 | 501,380 |
| 2010 | $223,098,881 | 0 | 495,696 |
| 2011 | $360,238,737 | 0 | 616,869 |
Note: Quantity represents Weight in carats
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