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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,011,561,160 | 435,605,421 | 435,605,421 |
| 2006 | $1,067,577,932 | 450,983,074 | 450,983,074 |
| 2007 | $1,370,635,683 | 473,156,177 | 473,156,177 |
| 2008 | $1,496,909,416 | 464,173,610 | 464,173,610 |
| 2009 | $1,422,208,217 | 484,394,377 | 484,394,377 |
| 2010 | $1,339,562,641 | 483,733,611 | 483,733,611 |
| 2011 | $1,429,452,636 | 456,598,897 | 456,598,897 |
Note: Quantity represents Weight in kilograms
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