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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $161,072,546 | 2,682,691,797 | 2,682,691,797 |
| 2006 | $186,419,160 | 2,896,119,960 | 2,896,119,960 |
| 2007 | $239,670,964 | 2,843,777,048 | 2,843,777,048 |
| 2008 | $131,389,356 | 1,634,743,678 | 1,634,743,678 |
| 2009 | $42,093,612 | 605,407,791 | 605,407,791 |
| 2010 | $34,682,801 | 558,695,790 | 558,695,790 |
Note: Quantity represents Weight in kilograms
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