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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,345,996,650 | 2,921,660,315 | 2,921,660,315 |
| 2006 | $1,434,441,194 | 2,646,588,800 | 2,646,588,800 |
| 2007 | $1,344,625,518 | 2,201,915,889 | 2,201,915,889 |
| 2008 | $1,017,848,425 | 1,376,612,437 | 1,376,612,437 |
| 2009 | $1,170,576,151 | 2,337,082,994 | 2,337,082,994 |
| 2010 | $1,264,336,369 | 1,787,508,176 | 1,787,508,176 |
| 2011 | $1,715,638,668 | 2,021,082,423 | 2,021,082,423 |
Note: Quantity represents Weight in kilograms
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