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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $504,044,000 | 18,042,255 | 18,042,255 |
| 2006 | $669,353,000 | 22,109,233 | 22,109,233 |
| 2007 | $682,186,000 | 19,484,385 | 19,484,385 |
| 2008 | $674,292,000 | 18,522,261 | 18,522,261 |
| 2009 | $492,383,000 | 13,433,610 | 13,433,610 |
| 2010 | $547,392,191 | 14,165,986 | 14,165,986 |
| 2011 | $696,532,390 | 16,827,048 | 16,827,048 |
Note: Quantity represents Weight in kilograms
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