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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $3,526,186,882 | 1,688,932,915 | 1,688,932,915 |
| 2006 | $4,899,390,901 | 1,796,275,856 | 1,796,275,856 |
| 2007 | $4,386,687,237 | 1,490,978,974 | 1,490,978,974 |
| 2008 | $3,837,046,171 | 1,312,508,075 | 1,312,508,075 |
| 2009 | $1,941,852,789 | 1,024,692,132 | 1,024,692,132 |
| 2010 | $2,957,438,333 | 1,212,234,559 | 1,212,234,559 |
| 2011 | $3,744,872,308 | 1,354,405,073 | 1,354,405,073 |
Note: Quantity represents Weight in kilograms
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