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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $909,766 | 13,531 | 67,655,000 |
| 2006 | $878,234 | 10,582 | 52,910,000 |
| 2007 | $425,859 | 9,083 | 45,415,000 |
| 2008 | $90,566 | 2,107 | 10,535,000 |
| 2009 | $286,416 | 1,842 | 9,210,000 |
| 2010 | $369,857 | 1,162 | 5,810,000 |
| 2011 | $463,017 | 1,257 | 6,285,000 |
Note: Quantity represents Weight in carats
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