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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $711,630,753 | 1,825,236,640 | 1,825,236,640 |
| 2006 | $598,347,803 | 1,525,703,519 | 1,525,703,519 |
| 2007 | $793,259,996 | 1,635,353,978 | 1,635,353,978 |
| 2008 | $755,978,414 | 1,068,921,550 | 1,068,921,550 |
| 2009 | $588,204,420 | 1,340,050,056 | 1,340,050,056 |
| 2010 | $553,564,799 | 1,078,268,030 | 1,078,268,030 |
| 2011 | $723,321,910 | 1,127,712,975 | 1,127,712,975 |
Note: Quantity represents Weight in kilograms
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