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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,371,764,414 | 4,089,156,872 | 4,089,156,872 |
| 2006 | $1,471,337,250 | 4,087,719,881 | 4,087,719,881 |
| 2007 | $1,525,384,733 | 4,261,243,270 | 4,261,243,270 |
| 2008 | $1,685,384,217 | 2,532,444,148 | 2,532,444,148 |
| 2009 | $1,898,516,243 | 3,853,172,271 | 3,853,172,271 |
| 2010 | $2,126,107,998 | 4,382,159,895 | 4,382,159,895 |
| 2011 | $2,326,686,875 | 4,397,475,105 | 4,397,475,105 |
Note: Quantity represents Weight in kilograms
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