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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $3,727,849,643 | 9,098,456,744 | 9,098,456,744 |
| 2006 | $4,278,632,710 | 10,449,712,715 | 10,449,712,715 |
| 2007 | $6,988,274,523 | 9,618,972,946 | 9,618,972,946 |
| 2008 | $10,864,054,346 | 10,927,164,657 | 10,927,164,657 |
| 2009 | $7,586,987,610 | 11,334,345,864 | 11,334,345,864 |
| 2010 | $10,092,430,125 | 11,849,645,877 | 11,849,645,877 |
| 2011 | $13,650,379,875 | 12,083,690,486 | 12,083,690,486 |
Note: Quantity represents Weight in kilograms
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