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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $2,179,732,427 | 25,016,289 | 25,016,289 |
| 2006 | $2,806,842,161 | 45,584,514 | 45,584,514 |
| 2007 | $3,433,705,928 | 46,166,097 | 46,166,097 |
| 2008 | $3,806,567,698 | 68,651,131 | 68,651,131 |
| 2009 | $3,213,182,717 | 90,413,723 | 90,413,723 |
| 2010 | $3,677,450,362 | 98,477,848 | 98,477,848 |
| 2011 | $3,528,673,659 | 109,388,037 | 109,388,037 |
Note: Quantity represents Weight in kilograms
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