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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $385,921 | 69 | 6,008 |
| 2006 | $546,701 | 94 | 4,278 |
| 2007 | $817,015 | 386 | 6,762 |
| 2008 | $891,935 | 101 | 505,000 |
| 2009 | $644,072 | 82 | 410,000 |
| 2010 | $1,390,086 | 40 | 10,452 |
| 2011 | $1,686,956 | 324 | 198,815 |
Note: Quantity represents Weight in carats
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