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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $7,580,337 | 7,395 | 29,076 |
| 2006 | $11,728,117 | 8,335 | 48,342 |
| 2007 | $14,684,243 | 8,829 | 44,145,000 |
| 2008 | $16,116,002 | 5,605 | 26,939 |
| 2009 | $10,491,565 | 3,654 | 19,743 |
| 2010 | $8,562,667 | 2,277 | 87,841 |
| 2011 | $9,787,862 | 1,611 | 52,414 |
Note: Quantity represents Weight in carats
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