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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $873,403,256 | 1,637,224,153 | 1,637,224,153 |
| 2006 | $799,464,922 | 1,542,378,897 | 1,542,378,897 |
| 2007 | $2,128,133,404 | 2,798,224,276 | 2,798,224,276 |
| 2008 | $3,287,744,806 | 2,549,913,996 | 2,549,913,996 |
| 2009 | $1,842,106,309 | 2,391,027,666 | 2,391,027,666 |
| 2010 | $1,199,864,827 | 1,337,597,087 | 1,337,597,087 |
| 2011 | $1,321,898,441 | 1,142,315,970 | 1,142,315,970 |
Note: Quantity represents Weight in kilograms
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