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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,325,093,346 | 3,127,929,068 | 3,127,929,068 |
| 2006 | $1,318,341,706 | 3,670,449,213 | 3,670,449,213 |
| 2007 | $1,600,861,975 | 3,923,422,372 | 3,923,422,372 |
| 2008 | $1,859,693,791 | 3,986,016,000 | 3,986,016,000 |
| 2009 | $1,457,933,909 | 4,469,552,000 | 4,469,552,000 |
| 2010 | $2,365,200,023 | 5,467,518,000 | 5,467,518,000 |
Note: Quantity represents Weight in kilograms
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