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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $469,488,440 | 6,254,078,012 | 6,254,078,012 |
| 2006 | $260,799,407 | 5,521,649,100 | 5,521,649,100 |
| 2007 | $424,023,685 | 6,150,514,610 | 6,150,514,610 |
| 2008 | $586,030,539 | 4,924,278,080 | 4,924,278,080 |
| 2009 | $236,388,457 | 2,835,953,500 | 2,835,953,500 |
| 2010 | $238,298,150 | 2,261,987,500 | 2,261,987,500 |
Note: Quantity represents Weight in kilograms
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