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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,294,105,439 | 57,901,809 | 57,901,809 |
| 2006 | $1,210,364,137 | 34,264,924 | 34,264,924 |
| 2007 | $1,362,362,344 | 0 | 0 |
| 2008 | $1,264,166,231 | 0 | 0 |
| 2009 | $1,168,181,964 | 0 | 0 |
| 2010 | $1,199,711,441 | 0 | 0 |
| 2011 | $1,165,241,827 | 0 | 0 |
Note: Quantity represents Weight in kilograms
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