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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $3,835,143,566 | 3,782,192,866 | 172 |
| 2006 | $4,845,684,596 | 3,614,660,150 | 186 |
| 2007 | $5,146,019,149 | 5,239,252,016 | 0 |
| 2008 | $7,416,553,456 | 4,957,806,663 | 0 |
| 2009 | $8,475,992,144 | 0 | 245 |
| 2010 | $8,236,032,350 | 2,822,755,497 | 223 |
| 2011 | $6,821,972,574 | 153 | 4,685,212 |
Note: Quantity represents Number of items
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