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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,368,589,342 | 1,687,209,775 | 1,687,209,775 |
| 2006 | $1,910,964,381 | 1,765,374,197 | 1,765,374,197 |
| 2007 | $2,446,345,766 | 2,090,624,472 | 2,090,624,472 |
| 2008 | $2,540,177,978 | 2,154,845,267 | 2,154,845,267 |
| 2009 | $2,751,824,685 | 2,626,116,348 | 2,626,116,348 |
| 2010 | $4,294,354,380 | 2,854,155,768 | 2,854,155,768 |
| 2011 | $4,625,402,398 | 2,685,684,205 | 2,685,684,205 |
Note: Quantity represents Weight in kilograms
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