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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $420,236,366 | 1,171,527,939 | 1,171,527,939 |
| 2006 | $420,471,563 | 1,045,489,103 | 1,045,489,103 |
| 2007 | $364,994,761 | 770,290,535 | 770,290,535 |
| 2008 | $642,420,188 | 782,767,421 | 782,767,421 |
| 2009 | $288,359,130 | 738,876,851 | 738,876,851 |
| 2010 | $287,379,875 | 552,058,543 | 552,058,543 |
| 2011 | $299,299,242 | 458,864,969 | 458,864,969 |
Note: Quantity represents Weight in kilograms
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