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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $56,063,068 | 147 | 310,575 |
| 2006 | $112,556,343 | 65 | 323,730 |
| 2007 | $41,644,867 | 25 | 125,140 |
| 2008 | $129,115,449 | 226 | 1,128,420 |
| 2009 | $79,848,677 | 395 | 1,972,835 |
| 2010 | $34,255,140 | 87 | 435,840 |
| 2011 | $46,249,760 | 19 | 95,370 |
Note: Quantity represents Weight in carats
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