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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,121,038,408 | 3,610,539,809 | 3,610,539,809 |
| 2006 | $1,098,850,062 | 3,224,849,758 | 3,224,849,758 |
| 2007 | $1,332,095,653 | 3,039,212,901 | 3,039,212,901 |
| 2008 | $2,556,214,140 | 3,753,181,201 | 3,753,181,201 |
| 2009 | $1,203,345,198 | 3,558,421,990 | 3,558,421,990 |
| 2010 | $1,140,585,596 | 2,416,881,177 | 2,416,881,177 |
| 2011 | $1,184,432,586 | 1,973,692,368 | 1,973,692,368 |
Note: Quantity represents Weight in kilograms
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