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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $31,283,369 | 8,075 | 7,758,933 |
| 2006 | $30,197,182 | 6,441 | 12,010,114 |
| 2007 | $33,046,527 | 24,035 | 4,240,077 |
| 2008 | $29,736,803 | 271,695 | 5,567,813 |
| 2009 | $18,648,241 | 1,020 | 3,814,860 |
| 2010 | $28,357,463 | 849 | 2,595,378 |
| 2011 | $36,057,526 | 983 | 1,619,296 |
Note: Quantity represents Weight in carats
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