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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $441,765,000 | 352,134,300 | 352,134,300 |
| 2006 | $471,152,000 | 359,405,500 | 359,405,500 |
| 2007 | $497,255,000 | 312,807,800 | 312,807,800 |
| 2008 | $627,832,000 | 338,883,700 | 338,883,700 |
| 2009 | $822,924,000 | 428,732,242 | 428,732,242 |
| 2010 | $855,239,881 | 482,740,900 | 482,740,900 |
| 2011 | $712,223,788 | 414,676,756 | 414,676,756 |
Note: Quantity represents Weight in kilograms
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