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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $610,198,885 | 2,997,712,502 | 2,997,712,502 |
| 2006 | $881,268,276 | 3,170,941,112 | 3,170,941,112 |
| 2007 | $485,518,206 | 1,757,432,436 | 1,757,432,436 |
| 2008 | $405,966,907 | 967,240,026 | 967,240,026 |
| 2009 | $157,831,323 | 931,346,824 | 931,346,824 |
| 2010 | $211,465,743 | 805,899,686 | 805,899,686 |
| 2011 | $213,892,881 | 595,406,465 | 595,406,465 |
Note: Quantity represents Weight in kilograms
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