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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $6,725,468,168 | 127,806,743 | 127,806,743 |
| 2006 | $6,784,544,585 | 168,097,050 | 168,097,050 |
| 2007 | $7,468,934,791 | 163,772,180 | 163,772,180 |
| 2008 | $6,547,369,509 | 127,600,400 | 127,600,400 |
| 2009 | $5,732,390,753 | 122,710,378 | 122,710,378 |
| 2010 | $5,135,449,033 | 952,996,063 | 952,996,063 |
| 2011 | $4,522,012,298 | 70,976,226 | 70,976,226 |
Note: Quantity represents Weight in kilograms
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