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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $575,177,894 | 9,486 | 9,486 |
| 2006 | $1,267,178,033 | 10,511 | 10,511 |
| 2007 | $1,612,644,769 | 10,189 | 10,189 |
| 2008 | $2,139,267,602 | 10,993 | 10,993 |
| 2009 | $503,570,625 | 9,924 | 9,924 |
| 2010 | $747,507,329 | 9,464 | 9,464 |
| 2011 | $590,126,260 | 8,755 | 8,755 |
Note: Quantity represents Weight in kilograms
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