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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $887,071,000 | 12,799,902,300 | 12,799,902,300 |
| 2006 | $1,118,894,000 | 14,265,212,900 | 14,265,212,900 |
| 2007 | $1,234,739,000 | 14,919,801,800 | 14,919,801,800 |
| 2008 | $1,729,915,000 | 13,303,558,100 | 13,303,558,100 |
| 2009 | $872,922,000 | 7,676,988,400 | 7,676,988,400 |
| 2010 | $1,859,582,217 | 13,380,410,200 | 13,380,410,200 |
| 2011 | $2,323,024,778 | 11,490,218,210 | 11,490,218,210 |
Note: Quantity represents Weight in kilograms
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