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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $3,229,408,181 | 307,688,318 | 307,688,318 |
| 2006 | $3,370,779,659 | 309,359,343 | 309,359,343 |
| 2007 | $2,527,726,509 | 237,005,680 | 237,005,680 |
| 2008 | $2,314,838,848 | 196,712,590 | 196,712,590 |
| 2009 | $1,765,181,496 | 149,923,774 | 149,923,774 |
| 2010 | $2,057,080,054 | 188,872,896 | 188,872,896 |
| 2011 | $2,390,268,728 | 211,157,993 | 211,157,993 |
Note: Quantity represents Weight in kilograms
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