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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,114,533,479 | 1,439,619,313 | 1,439,619,313 |
| 2006 | $1,172,232,752 | 1,491,471,617 | 1,491,471,617 |
| 2007 | $1,478,061,218 | 1,519,305,587 | 1,519,305,587 |
| 2008 | $2,187,576,242 | 1,442,188,724 | 1,442,188,724 |
| 2009 | $1,811,275,704 | 1,464,344,546 | 1,464,344,546 |
| 2010 | $1,668,032,786 | 1,521,898,669 | 1,521,898,669 |
| 2011 | $1,907,500,327 | 1,572,017,032 | 1,572,017,032 |
Note: Quantity represents Weight in kilograms
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