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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $37,949,860 | 0 | 7,075,716 |
| 2006 | $31,565,529 | 0 | 6,046,140 |
| 2007 | $29,049,501 | 0 | 6,184,742 |
| 2008 | $26,846,656 | 0 | 5,728,391 |
| 2009 | $40,689,122 | 0 | 5,072,570 |
| 2010 | $58,768,456 | 0 | 6,557,131 |
| 2011 | $64,591,781 | 0 | 22,754,163 |
Note: Quantity represents Weight in carats
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