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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,030,587,539 | 405,900,664 | 405,900,664 |
| 2006 | $1,355,708,806 | 534,915,847 | 534,915,847 |
| 2007 | $1,982,350,230 | 721,168,931 | 721,168,931 |
| 2008 | $2,315,489,839 | 796,353,077 | 796,353,077 |
| 2009 | $1,951,217,441 | 874,094,761 | 874,094,761 |
| 2010 | $2,555,081,404 | 823,235,975 | 823,235,975 |
| 2011 | $3,010,171,910 | 809,063,113 | 809,063,113 |
Note: Quantity represents Weight in kilograms
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