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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $8,081,946,181 | 4,039,441,488 | 0 |
| 2006 | $8,715,463,194 | 3,391,322,170 | 0 |
| 2007 | $11,829,173,309 | 4,652,804,161 | 0 |
| 2008 | $20,690,875,802 | 6,116,952,170 | 0 |
| 2009 | $23,976,439,537 | 10,270,473,310 | 1,552 |
| 2010 | $16,839,277,760 | 6,394,745,239 | 0 |
| 2011 | $17,561,703,063 | 6,191,835,087 | 0 |
Note: Quantity represents No Quantity
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