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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,039,863,000 | 3,921,592,500 | 3,921,592,500 |
| 2006 | $945,389,000 | 3,536,061,100 | 3,536,061,100 |
| 2007 | $1,231,939,000 | 3,692,752,500 | 3,692,752,500 |
| 2008 | $1,856,166,000 | 3,484,860,600 | 3,484,860,600 |
| 2009 | $1,448,018,000 | 3,165,418,300 | 3,165,418,300 |
| 2010 | $1,487,491,157 | 3,383,117,300 | 3,383,117,300 |
| 2011 | $1,719,743,446 | 3,188,193,534 | 3,188,193,534 |
Note: Quantity represents Weight in kilograms
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