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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $7,637,800,796 | 42,385,213,723 | 42,385,213,723 |
| 2006 | $8,803,346,734 | 38,598,913,022 | 38,598,913,022 |
| 2007 | $8,281,192,030 | 92,684,892,617 | 92,684,892,617 |
| 2008 | $14,515,843,141 | 26,153,069,276 | 26,153,069,276 |
| 2009 | $8,016,595,761 | 13,837,654,464 | 13,837,654,464 |
| 2010 | $10,584,063,275 | 67,404,631,624 | 67,404,631,624 |
| 2011 | $13,371,826,619 | 37,294,733,928 | 37,294,733,928 |
Note: Quantity represents Weight in kilograms
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