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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,210,916 | 16,644 | 84,149,528 |
| 2006 | $1,116,031 | 6,216 | 30,962,961 |
| 2007 | $1,204,535 | 6,191 | 31,964,591 |
| 2008 | $942,928 | 6,820 | 32,091,851 |
| 2009 | $734,218 | 16,277 | 82,594,765 |
| 2010 | $1,687,383 | 7,044 | 35,303,628 |
| 2011 | $754,364 | 9,555 | 47,774,738 |
Note: Quantity represents Weight in carats
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