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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $16,613,690 | 2,138 | 8,490,229 |
| 2006 | $13,666,673 | 2,740 | 0 |
| 2007 | $8,414,681 | 10,343 | 67,062,395 |
| 2008 | $5,860,666 | 715,067 | 42,938,192 |
| 2009 | $4,028,363 | 464,644 | 30,861,760 |
| 2010 | $3,690,788 | 380,154 | 27,500,320 |
Note: Quantity represents Weight in carats
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