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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $657,567,274 | 323,837,047 | 323,837,047 |
| 2006 | $922,587,139 | 351,306,382 | 351,306,382 |
| 2007 | $920,692,951 | 337,677,694 | 337,677,694 |
| 2008 | $808,939,366 | 332,614,803 | 332,614,803 |
| 2009 | $464,170,021 | 240,664,598 | 240,664,598 |
| 2010 | $810,889,261 | 329,474,042 | 329,474,042 |
| 2011 | $1,046,561,039 | 382,237,755 | 382,237,755 |
Note: Quantity represents Weight in kilograms
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