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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $6,570,721,571 | 63,305,677 | 63,305,677 |
| 2006 | $8,697,298,749 | 83,794,204 | 83,794,204 |
| 2007 | $10,777,979,365 | 0 | 0 |
| 2008 | $11,064,648,374 | 0 | 0 |
| 2009 | $9,461,177,064 | 0 | 0 |
| 2010 | $12,086,764,270 | 139,045,139 | 139,045,139 |
| 2011 | $14,016,765,646 | 135,203,347 | 135,203,347 |
Note: Quantity represents Weight in kilograms
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