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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $5,635,269,422 | 13,549,599,561 | 13,549,599,561 |
| 2006 | $4,271,568,457 | 8,487,864,397 | 8,487,864,397 |
| 2007 | $4,500,171,124 | 7,448,386,585 | 7,448,386,585 |
| 2008 | $4,934,209,901 | 6,374,968,000 | 6,374,968,000 |
| 2009 | $2,175,784,340 | 4,387,799,000 | 4,387,799,000 |
| 2010 | $2,639,315,032 | 3,710,861,000 | 3,710,861,000 |
Note: Quantity represents Weight in kilograms
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