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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $6,773,616,705 | 86,351,153 | 86,351,153 |
| 2006 | $7,486,368,552 | 123,482,388 | 123,482,388 |
| 2007 | $8,551,909,385 | 64,304,234 | 64,304,234 |
| 2008 | $9,078,209,333 | 57,047,245 | 57,047,245 |
| 2009 | $9,065,897,981 | 0 | 0 |
| 2010 | $9,432,387,150 | 57,100,687 | 57,100,687 |
Note: Quantity represents Weight in kilograms
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