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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,008,617,000 | 630,719,400 | 630,719,400 |
| 2006 | $1,616,408,000 | 785,059,800 | 785,059,800 |
| 2007 | $2,723,653,000 | 804,438,900 | 804,438,900 |
| 2008 | $2,088,007,000 | 807,152,900 | 807,152,900 |
| 2009 | $951,393,000 | 619,571,200 | 619,571,200 |
| 2010 | $1,812,559,135 | 816,745,300 | 816,745,300 |
| 2011 | $2,134,680,640 | 927,985,066 | 927,985,066 |
Note: Quantity represents Weight in kilograms
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