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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,002,541,000 | 674,618,800 | 674,618,800 |
| 2006 | $1,076,686,000 | 717,712,400 | 717,712,400 |
| 2007 | $1,227,834,000 | 663,561,400 | 663,561,400 |
| 2008 | $1,299,992,000 | 654,965,400 | 654,965,400 |
| 2009 | $1,184,856,000 | 657,021,100 | 657,021,100 |
| 2010 | $1,334,184,919 | 681,215,500 | 681,215,500 |
| 2011 | $1,333,971,150 | 705,609,801 | 705,609,801 |
Note: Quantity represents Weight in kilograms
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