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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,047,315,557 | 1,693,905 | 1,693,905 |
| 2006 | $763,357,173 | 793,261 | 793,261 |
| 2007 | $801,105,724 | 662,723 | 662,723 |
| 2008 | $655,938,914 | 611,776 | 611,776 |
| 2009 | $512,041,930 | 658,674 | 658,674 |
| 2010 | $303,234,291 | 575,981 | 575,981 |
| 2011 | $359,083,083 | 637,115 | 637,115 |
Note: Quantity represents Weight in kilograms
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