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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $2,847,387,572 | 348,624,800 | 348,624,800 |
| 2006 | $3,268,777,314 | 400,218,378 | 400,218,378 |
| 2007 | $3,272,301,421 | 400,472,305 | 400,472,305 |
| 2008 | $2,499,862,762 | 251,129,755 | 251,129,755 |
| 2009 | $2,146,084,226 | 186,861,385 | 186,861,385 |
| 2010 | $3,587,142,584 | 320,049,324 | 320,049,324 |
| 2011 | $4,319,208,700 | 379,999,067 | 379,999,067 |
Note: Quantity represents Weight in kilograms
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