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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $7,000,972,798 | 0 | 0 |
| 2006 | $7,919,134,642 | 0 | 0 |
| 2007 | $7,722,867,090 | 539,105 | 539,105 |
| 2008 | $5,484,789,686 | 296,724 | 296,724 |
| 2009 | $4,025,376,957 | 157,199 | 157,199 |
| 2010 | $4,449,018,939 | 188,083 | 188,083 |
| 2011 | $4,998,467,526 | 175,248 | 175,248 |
Note: Quantity represents No Quantity
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