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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,468,947,986 | 1,920,668,927 | 1,920,668,927 |
| 2006 | $1,115,400,292 | 1,491,232,873 | 1,491,232,873 |
| 2007 | $1,152,730,718 | 1,427,112,016 | 1,427,112,016 |
| 2008 | $1,180,861,010 | 1,217,780,051 | 1,217,780,051 |
| 2009 | $938,190,948 | 1,120,262,109 | 1,120,262,109 |
| 2010 | $1,204,119,717 | 1,281,465,725 | 1,281,465,725 |
| 2011 | $1,174,546,543 | 1,114,903,650 | 1,114,903,650 |
Note: Quantity represents Weight in kilograms
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