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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $5,953,674 | 6,935 | 26,756,498 |
| 2006 | $6,166,948 | 7,061 | 29,265,391 |
| 2007 | $6,785,229 | 31,178 | 40,395,847 |
| 2008 | $6,292,930 | 8,799 | 42,457,833 |
| 2009 | $4,621,855 | 8,303 | 38,384,429 |
| 2010 | $5,868,066 | 9,683 | 48,412,675 |
| 2011 | $5,771,529 | 11,306 | 46,260,636 |
Note: Quantity represents Weight in carats
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