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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $23,799,250 | 2,968,469,272 | 2,968,469,272 |
| 2006 | $32,028,580 | 3,866,816,769 | 3,866,816,769 |
| 2007 | $25,821,303 | 2,785,263,024 | 2,785,263,024 |
| 2008 | $33,125,652 | 0 | 0 |
| 2009 | $15,392,033 | 1,409,490,001 | 1,409,490,001 |
| 2010 | $16,099,594 | 1,941,166,419 | 1,941,166,419 |
| 2011 | $20,178,998 | 2,364,386,016 | 2,364,386,016 |
Note: Quantity represents Weight in kilograms
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