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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,723,938 | 763 | 3,816,540 |
| 2006 | $1,704,860 | 928 | 4,641,090 |
| 2007 | $1,841,510 | 1,695 | 8,473,445 |
| 2008 | $1,595,473 | 1,178 | 5,891,661 |
| 2009 | $1,245,847 | 1,103 | 5,514,973 |
| 2010 | $1,406,373 | 1,993 | 10,117,653 |
| 2011 | $1,597,382 | 3,280 | 16,401,864 |
Note: Quantity represents Weight in carats
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