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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $290,759,000 | 305,098,700 | 305,098,700 |
| 2006 | $372,450,000 | 296,509,300 | 296,509,300 |
| 2007 | $344,883,000 | 249,023,300 | 249,023,300 |
| 2008 | $460,268,000 | 262,649,500 | 262,649,500 |
| 2009 | $343,275,000 | 274,852,600 | 274,852,600 |
| 2010 | $385,763,621 | 275,399,500 | 275,399,500 |
| 2011 | $342,921,432 | 270,984,156 | 270,984,156 |
Note: Quantity represents Weight in kilograms
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