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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,057,708,228 | 187,525,118 | 187,525,118 |
| 2006 | $903,407,767 | 161,984,576 | 161,984,576 |
| 2007 | $934,939,303 | 164,339,287 | 164,339,287 |
| 2008 | $767,698,578 | 134,370,486 | 134,370,486 |
| 2009 | $657,282,224 | 115,975,685 | 115,975,685 |
| 2010 | $704,314,088 | 108,170,010 | 108,170,010 |
| 2011 | $796,473,286 | 98,617,929 | 98,617,929 |
Note: Quantity represents Weight in kilograms
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