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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $167,667,418 | 0 | 16,790,133 |
| 2006 | $167,126,792 | 0 | 18,114,088 |
| 2007 | $172,575,166 | 0 | 14,082,739 |
| 2008 | $188,841,169 | 0 | 21,699,217 |
| 2009 | $170,263,879 | 0 | 73,642,015 |
| 2010 | $201,752,061 | 0 | 0 |
| 2011 | $210,020,075 | 0 | 189,165,381 |
Note: Quantity represents Weight in carats
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