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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $98,505,972 | 0 | 2,611,315 |
| 2006 | $93,465,079 | 0 | 2,448,566 |
| 2007 | $103,517,935 | 121 | 4,589,216 |
| 2008 | $128,354,053 | 0 | 4,988,537 |
| 2009 | $94,475,530 | 0 | 5,955,111 |
| 2010 | $132,455,650 | 0 | 3,255,237 |
| 2011 | $50,921,131 | 0 | 1,631,182 |
Note: Quantity represents Weight in carats
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