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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,115,993 | 0 | 1,934,792 |
| 2006 | $532,893 | 0 | 24,190 |
| 2007 | $2,085,705 | 156 | 245,415 |
| 2008 | $8,554,081 | 421 | 2,089,056 |
| 2009 | $18,490,521 | 940 | 214,291 |
| 2010 | $5,703,264 | 0 | 0 |
| 2011 | $3,544,345 | 179 | 367,838 |
Note: Quantity represents Weight in carats
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