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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $688,995,000 | 761,345,600 | 761,345,600 |
| 2006 | $1,153,380,000 | 884,021,400 | 884,021,400 |
| 2007 | $1,113,107,000 | 696,859,800 | 696,859,800 |
| 2008 | $1,104,029,000 | 555,962,200 | 555,962,200 |
| 2009 | $982,069,000 | 691,129,600 | 691,129,600 |
| 2010 | $987,974,792 | 907,123,900 | 907,123,900 |
| 2011 | $1,947,065,003 | 1,877,575,820 | 1,877,575,820 |
Note: Quantity represents Weight in kilograms
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