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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,018,495,694 | 354,424,715 | 354,424,715 |
| 2006 | $935,080,527 | 325,433,413 | 325,433,413 |
| 2007 | $914,916,723 | 301,497,522 | 301,497,522 |
| 2008 | $1,090,832,620 | 325,116,380 | 325,116,380 |
| 2009 | $934,872,515 | 315,633,830 | 315,633,830 |
| 2010 | $1,105,222,352 | 308,766,779 | 308,766,779 |
| 2011 | $1,329,595,959 | 300,891,019 | 300,891,019 |
Note: Quantity represents Weight in kilograms
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