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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $2,341,123,046 | 1,112,149,971 | 1,112,149,971 |
| 2006 | $2,628,973,265 | 1,171,827,566 | 1,171,827,566 |
| 2007 | $3,025,391,110 | 1,213,379,646 | 1,213,379,646 |
| 2008 | $3,549,696,562 | 1,430,034,790 | 1,430,034,790 |
| 2009 | $3,184,455,893 | 1,166,639,588 | 1,166,639,588 |
| 2010 | $3,848,637,433 | 1,197,887,987 | 1,197,887,987 |
| 2011 | $6,512,035,795 | 1,277,699,704 | 1,277,699,704 |
Note: Quantity represents Weight in kilograms
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