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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $545,762,852 | 804,229,247 | 804,229,247 |
| 2006 | $917,049,775 | 1,278,971,144 | 1,278,971,144 |
| 2007 | $1,482,356,558 | 1,732,795,647 | 1,732,795,647 |
| 2008 | $1,440,320,712 | 1,384,173,368 | 1,384,173,368 |
| 2009 | $557,527,121 | 746,252,968 | 746,252,968 |
| 2010 | $686,315,679 | 869,394,905 | 869,394,905 |
| 2011 | $1,022,632,811 | 1,111,907,400 | 1,111,907,400 |
Note: Quantity represents Weight in kilograms
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