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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,440,217,467 | 1,607,893,189 | 1,607,893,189 |
| 2006 | $2,103,422,586 | 1,840,255,372 | 1,840,255,372 |
| 2007 | $3,324,778,504 | 2,903,019,573 | 2,903,019,573 |
| 2008 | $4,135,491,937 | 3,420,438,449 | 3,420,438,449 |
| 2009 | $3,478,105,800 | 3,705,258,562 | 3,705,258,562 |
| 2010 | $3,689,198,602 | 3,527,145,419 | 3,527,145,419 |
| 2011 | $7,765,464,477 | 4,987,315,027 | 4,987,315,027 |
Note: Quantity represents Weight in kilograms
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