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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $3,581,112,333 | 584,194,508 | 584,194,508 |
| 2006 | $3,740,945,832 | 492,000,287 | 492,000,287 |
| 2007 | $4,353,925,202 | 525,330,003 | 525,330,003 |
| 2008 | $4,143,145,184 | 539,950,165 | 539,950,165 |
| 2009 | $3,368,723,434 | 442,562,396 | 442,562,396 |
| 2010 | $4,265,672,960 | 472,654,166 | 472,654,166 |
| 2011 | $4,505,546,150 | 674,839,076 | 674,839,076 |
Note: Quantity represents Weight in kilograms
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