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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $4,008,394,985 | 647,954,756 | 647,954,756 |
| 2006 | $4,314,162,960 | 608,193,943 | 608,193,943 |
| 2007 | $4,548,677,031 | 1,137,249 | 1,137,249 |
| 2008 | $4,641,883,238 | 437,570,896 | 437,570,896 |
| 2009 | $4,046,237,143 | 342,413,126 | 342,413,126 |
| 2010 | $4,991,341,321 | 429,723,584 | 429,723,584 |
| 2011 | $5,355,229,626 | 478,268,643 | 478,268,643 |
Note: Quantity represents Weight in kilograms
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