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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $886,378,755 | 457,127,049 | 457,127,049 |
| 2006 | $1,285,588,482 | 494,313,886 | 494,313,886 |
| 2007 | $1,530,184,000 | 551,776,856 | 551,776,856 |
| 2008 | $1,465,019,303 | 530,148,084 | 530,148,084 |
| 2009 | $779,657,942 | 431,180,955 | 431,180,955 |
| 2010 | $1,218,042,676 | 544,599,801 | 544,599,801 |
| 2011 | $1,278,751,897 | 499,719,975 | 499,719,975 |
Note: Quantity represents Weight in kilograms
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