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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,031,428,478 | 223,782,975 | 223,782,975 |
| 2006 | $1,039,413,276 | 222,586,810 | 222,586,810 |
| 2007 | $1,134,616,630 | 237,572,751 | 237,572,751 |
| 2008 | $1,050,888,643 | 102,245,983 | 102,245,983 |
| 2009 | $687,867,962 | 115,978,214 | 115,978,214 |
| 2010 | $1,121,626,901 | 190,011,656 | 190,011,656 |
| 2011 | $1,421,034,554 | 227,726,321 | 227,726,321 |
Note: Quantity represents Weight in kilograms
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