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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $16,586,159 | 103,350 | 220,942,863 |
| 2006 | $15,351,583 | 32,665 | 163,325,068 |
| 2007 | $17,903,219 | 61,655 | 308,273,160 |
| 2008 | $27,912,323 | 91,455 | 457,276,177 |
| 2009 | $15,703,343 | 143,021 | 715,103,869 |
| 2010 | $15,298,650 | 79,959 | 399,793,967 |
| 2011 | $25,300,292 | 97,539 | 487,692,977 |
Note: Quantity represents Weight in carats
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