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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $5,248,214 | 1,775 | 5,886,295 |
| 2006 | $8,705,787 | 1,193 | 5,965,145 |
| 2007 | $5,287,083 | 1,226 | 6,131,645 |
| 2008 | $11,461,653 | 3,250 | 16,249,866 |
| 2009 | $5,825,440 | 322 | 1,611,695 |
| 2010 | $4,875,412 | 209 | 1,043,925 |
| 2011 | $7,258,438 | 375 | 1,874,120 |
Note: Quantity represents Weight in carats
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