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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $683,514,498 | 212,257,782 | 212,257,782 |
| 2006 | $666,830,254 | 219,633,598 | 219,633,598 |
| 2007 | $658,481,061 | 213,301,505 | 213,301,505 |
| 2008 | $600,104,545 | 181,541,752 | 181,541,752 |
| 2009 | $471,300,300 | 158,275,818 | 158,275,818 |
| 2010 | $638,248,580 | 180,131,891 | 180,131,891 |
| 2011 | $638,507,402 | 162,612,347 | 162,612,347 |
Note: Quantity represents Weight in kilograms
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