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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $5,396,840,051 | 18,404,854,662 | 18,404,854,662 |
| 2006 | $6,934,010,058 | 19,109,671,397 | 19,109,671,397 |
| 2007 | $7,428,356,049 | 17,356,398,555 | 17,356,398,555 |
| 2008 | $10,567,947,401 | 17,817,546,652 | 17,817,546,652 |
| 2009 | $6,284,131,076 | 16,721,352,741 | 16,721,352,741 |
| 2010 | $8,951,940,959 | 17,407,615,617 | 17,407,615,617 |
| 2011 | $11,802,653,380 | 17,025,440,168 | 17,025,440,168 |
Note: Quantity represents Weight in kilograms
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