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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $19,182,239 | 108 | 377,225 |
| 2006 | $31,784,279 | 132 | 414,655 |
| 2007 | $45,015,838 | 203 | 1,068,600 |
| 2008 | $61,843,618 | 47 | 289,270 |
| 2009 | $34,050,225 | 50 | 292,335 |
| 2010 | $28,152,842 | 74 | 404,800 |
| 2011 | $138,211,460 | 90 | 505,200 |
Note: Quantity represents Weight in carats
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