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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $861,006,859 | 2,315,391,587 | 2,315,391,587 |
| 2006 | $995,021,326 | 2,197,163,803 | 2,197,163,803 |
| 2007 | $1,076,438,329 | 2,293,838,097 | 2,293,838,097 |
| 2008 | $2,976,699,042 | 1,629,314,442 | 1,629,314,442 |
| 2009 | $1,002,215,512 | 1,909,199,356 | 1,909,199,356 |
| 2010 | $1,633,333,117 | 2,346,621,646 | 2,346,621,646 |
Note: Quantity represents Weight in kilograms
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