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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $5,855,407 | 17,430 | 65,817 |
| 2006 | $7,983,745 | 10,893 | 79,420 |
| 2007 | $8,809,697 | 20,779 | 182,824 |
| 2008 | $9,572,587 | 30,940 | 134,492 |
| 2009 | $9,440,203 | 68 | 78,553 |
| 2010 | $9,615,756 | 52 | 258,956 |
| 2011 | $14,661,626 | 2,047 | 180,974 |
Note: Quantity represents Weight in carats
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