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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $4,938,178,796 | 644,183,056 | 644,183,056 |
| 2006 | $5,171,546,701 | 727,535,932 | 727,535,932 |
| 2007 | $5,248,981,624 | 710,645,116 | 710,645,116 |
| 2008 | $4,933,233,414 | 256,875,389 | 256,875,389 |
| 2009 | $3,145,315,339 | 387,869,359 | 387,869,359 |
| 2010 | $4,594,352,244 | 575,763,020 | 575,763,020 |
| 2011 | $5,131,036,289 | 582,182,145 | 582,182,145 |
Note: Quantity represents Weight in kilograms
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