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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $5,616,005 | 0 | 6,144,819 |
| 2006 | $7,276,871 | 0 | 9,178,140 |
| 2007 | $9,196,433 | 7,172 | 9,843,038 |
| 2008 | $9,680,930 | 7,176 | 10,037,279 |
| 2009 | $4,992,274 | 4,305 | 7,875,047 |
| 2010 | $10,827,658 | 10,698 | 17,828,325 |
| 2011 | $14,816,850 | 15,450 | 26,826,781 |
Note: Quantity represents Weight in carats
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