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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $2,361,547,357 | 550,007,586 | 550,007,586 |
| 2006 | $2,711,072,642 | 611,107,121 | 611,107,121 |
| 2007 | $2,525,935,578 | 486,109,383 | 486,109,383 |
| 2008 | $2,805,266,940 | 125,147,115 | 125,147,115 |
| 2009 | $1,807,413,385 | 279,720,643 | 279,720,643 |
| 2010 | $2,590,908,702 | 437,835,672 | 437,835,672 |
| 2011 | $3,667,152,781 | 606,654,246 | 606,654,246 |
Note: Quantity represents Weight in kilograms
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