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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $8,599,315,352 | 23,259,922,760 | 23,259,922,760 |
| 2006 | $9,993,136,985 | 22,739,603,258 | 22,739,603,258 |
| 2007 | $9,773,052,845 | 20,950,966,368 | 20,950,966,368 |
| 2008 | $12,993,549,933 | 20,678,865,660 | 20,678,865,660 |
| 2009 | $7,500,055,173 | 19,019,402,385 | 19,019,402,385 |
| 2010 | $10,571,561,787 | 24,179,717,789 | 24,179,717,789 |
| 2011 | $17,972,740,434 | 27,412,872,218 | 27,412,872,218 |
Note: Quantity represents Weight in kilograms
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