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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,280,342,975 | 10,429,602,505 | 10,429,602,505 |
| 2006 | $1,471,740,225 | 9,695,708,570 | 9,695,708,570 |
| 2007 | $2,015,539,972 | 9,643,926,544 | 9,643,926,544 |
| 2008 | $2,543,571,633 | 8,764,824,849 | 8,764,824,849 |
| 2009 | $1,000,661,707 | 5,114,253,436 | 5,114,253,436 |
| 2010 | $900,773,909 | 4,036,304,079 | 4,036,304,079 |
| 2011 | $2,493,315,270 | 8,372,325,419 | 8,372,325,419 |
Note: Quantity represents Weight in kilograms
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