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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,370,039,956 | 17,647,495 | 17,647,495 |
| 2006 | $1,165,473,762 | 13,808,778 | 13,808,778 |
| 2007 | $796,908,086 | 8,277,131 | 8,277,131 |
| 2008 | $658,221,242 | 7,032,759 | 7,032,759 |
| 2009 | $481,764,997 | 4,444,592 | 4,444,592 |
| 2010 | $516,282,111 | 5,190,972 | 5,190,972 |
| 2011 | $580,083,322 | 5,603,835 | 5,603,835 |
Note: Quantity represents Weight in kilograms
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