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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,183,808,000 | 2,269,319,900 | 2,269,319,900 |
| 2006 | $1,329,170,000 | 2,339,841,200 | 2,339,841,200 |
| 2007 | $1,529,461,000 | 2,485,021,900 | 2,485,021,900 |
| 2008 | $1,777,034,000 | 2,618,083,000 | 2,618,083,000 |
| 2009 | $1,130,069,000 | 2,253,039,100 | 2,253,039,100 |
| 2010 | $1,759,323,395 | 2,458,167,900 | 2,458,167,900 |
| 2011 | $1,684,024,308 | 2,362,753,997 | 2,362,753,997 |
Note: Quantity represents Weight in kilograms
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