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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $351,060,148 | 21,855 | 757,670 |
| 2006 | $413,692,557 | 15,745 | 622,806 |
| 2007 | $375,900,804 | 121 | 568,111 |
| 2008 | $516,653,165 | 136 | 618,472 |
| 2009 | $328,368,623 | 93 | 433,891 |
| 2010 | $355,699,877 | 100 | 421,031 |
| 2011 | $406,720,523 | 106 | 472,070 |
Note: Quantity represents Weight in carats
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