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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,442,324,157 | 3,855,069,845 | 3,855,069,845 |
| 2006 | $1,673,194,527 | 3,778,918,311 | 3,778,918,311 |
| 2007 | $2,187,542,101 | 4,285,564,754 | 4,285,564,754 |
| 2008 | $2,568,802,291 | 3,476,265,500 | 3,476,265,500 |
| 2009 | $1,792,222,842 | 4,044,874,423 | 4,044,874,423 |
| 2010 | $2,034,430,829 | 3,517,451,772 | 3,517,451,772 |
| 2011 | $2,287,117,150 | 2,838,312,711 | 2,838,312,711 |
Note: Quantity represents Weight in kilograms
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