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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $45,275,960 | 11,604,198 | 11,604,198 |
| 2006 | $64,088,245 | 14,064,961 | 14,064,961 |
| 2007 | $5,981,445,947 | 407,181,511 | 407,181,511 |
| 2008 | $6,536,395,428 | 414,751,736 | 414,751,736 |
| 2009 | $5,883,303,247 | 345,894,834 | 345,894,834 |
| 2010 | $7,549,477,877 | 429,083,497 | 429,083,497 |
| 2011 | $8,034,533,764 | 436,023,273 | 436,023,273 |
Note: Quantity represents Weight in kilograms
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