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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,141,237,505 | 1,238,650,807 | 1,238,650,807 |
| 2006 | $1,233,494,484 | 1,473,998,263 | 1,473,998,263 |
| 2007 | $1,147,782,789 | 1,277,932,520 | 1,277,932,520 |
| 2008 | $1,299,434,340 | 1,048,228,311 | 1,048,228,311 |
| 2009 | $646,031,314 | 549,098,011 | 549,098,011 |
| 2010 | $783,363,227 | 714,736,306 | 714,736,306 |
| 2011 | $891,268,096 | 733,432,976 | 733,432,976 |
Note: Quantity represents Weight in kilograms
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