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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $634,788 | 11,175 | 696,038 |
| 2006 | $681,822 | 154 | 769,511 |
| 2007 | $890,926 | 475 | 2,375,000 |
| 2008 | $531,989 | 381 | 1,905,000 |
| 2009 | $487,839 | 2,136 | 10,680,000 |
| 2010 | $701,618 | 415 | 2,075,000 |
| 2011 | $774,970 | 388 | 1,940,000 |
Note: Quantity represents Weight in carats
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