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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $48,335,265 | 1,800,095,321 | 1,800,095,321 |
| 2006 | $160,073,026 | 4,851,585,334 | 4,851,585,334 |
| 2007 | $269,872,825 | 6,238,339,496 | 6,238,339,496 |
| 2008 | $499,544,705 | 8,379,829,734 | 8,379,829,734 |
| 2009 | $492,550,335 | 11,317,903,535 | 11,317,903,535 |
| 2010 | $605,963,959 | 9,700,718,268 | 9,700,718,268 |
| 2011 | $851,582,290 | 11,514,230,366 | 11,514,230,366 |
Note: Quantity represents Weight in kilograms
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