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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $548,230,626 | 4,022,235 | 4,022,235 |
| 2006 | $642,934,895 | 4,777,056 | 4,777,056 |
| 2007 | $549,147,017 | 3,651,297 | 3,651,297 |
| 2008 | $543,962,667 | 4,282,976 | 4,282,976 |
| 2009 | $547,215,242 | 3,622,758 | 3,622,758 |
| 2010 | $747,539,047 | 5,606,543 | 5,606,543 |
| 2011 | $715,256,230 | 4,958,585 | 4,958,585 |
Note: Quantity represents Weight in kilograms
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