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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $898,180,136 | 2,042,463,408 | 2,042,463,408 |
| 2006 | $1,128,084,435 | 2,740,358,472 | 2,740,358,472 |
| 2007 | $1,103,805,291 | 2,739,768,338 | 2,739,768,338 |
| 2008 | $1,262,414,027 | 2,940,734,273 | 2,940,734,273 |
| 2009 | $1,023,440,877 | 3,121,167,910 | 3,121,167,910 |
| 2010 | $1,189,538,556 | 3,221,963,616 | 3,221,963,616 |
| 2011 | $1,231,766,884 | 2,867,812,942 | 2,867,812,942 |
Note: Quantity represents Weight in kilograms
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