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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $5,068,063,165 | 670,667,027 | 670,667,027 |
| 2006 | $5,321,828,853 | 772,058,015 | 772,058,015 |
| 2007 | $5,396,463,053 | 769,376,113 | 769,376,113 |
| 2008 | $5,100,309,162 | 609,969,302 | 609,969,302 |
| 2009 | $3,470,656,764 | 380,054,218 | 380,054,218 |
| 2010 | $3,818,567,871 | 452,145,244 | 452,145,244 |
| 2011 | $4,227,022,931 | 470,057,030 | 470,057,030 |
Note: Quantity represents Weight in kilograms
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