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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,072,648,723 | 22,715,983 | 22,715,983 |
| 2006 | $973,276,373 | 15,095,978 | 15,095,978 |
| 2007 | $843,718,842 | 12,465,412 | 12,465,412 |
| 2008 | $632,963,651 | 8,622,404 | 8,622,404 |
| 2009 | $430,832,163 | 4,998,387 | 4,998,387 |
| 2010 | $477,011,219 | 5,367,009 | 5,367,009 |
| 2011 | $476,383,642 | 5,142,567 | 5,142,567 |
Note: Quantity represents Weight in kilograms
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