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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $630,429,751 | 41,580,960 | 41,580,960 |
| 2006 | $726,511,121 | 35,682,477 | 35,682,477 |
| 2007 | $710,084,272 | 18,334,465 | 18,334,465 |
| 2008 | $399,181,594 | 16,985,034 | 16,985,034 |
| 2009 | $349,490,591 | 23,265,990 | 23,265,990 |
| 2010 | $528,789,357 | 23,938,997 | 23,938,997 |
| 2011 | $588,366,731 | 23,882,591 | 23,882,591 |
Note: Quantity represents Weight in kilograms
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