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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $337,904,000 | 426,332,300 | 426,332,300 |
| 2006 | $329,636,000 | 438,802,800 | 438,802,800 |
| 2007 | $420,299,000 | 421,955,100 | 421,955,100 |
| 2008 | $931,003,000 | 498,024,570 | 498,024,570 |
| 2009 | $303,242,000 | 275,734,900 | 275,734,900 |
| 2010 | $553,289,588 | 408,518,300 | 408,518,300 |
| 2011 | $564,084,215 | 406,060,956 | 406,060,956 |
Note: Quantity represents Weight in kilograms
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