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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $528,958,112 | 2,285,489,551 | 2,285,489,551 |
| 2006 | $478,105,302 | 1,952,094,524 | 1,952,094,524 |
| 2007 | $385,282,731 | 1,350,486,042 | 1,350,486,042 |
| 2008 | $402,556,115 | 644,661,161 | 644,661,161 |
| 2009 | $526,870,148 | 1,310,190,940 | 1,310,190,940 |
| 2010 | $445,864,494 | 1,075,490,126 | 1,075,490,126 |
| 2011 | $531,911,161 | 1,017,736,582 | 1,017,736,582 |
Note: Quantity represents Weight in kilograms
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