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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,810,414,984 | 7,085,882,561 | 7,085,882,561 |
| 2006 | $1,637,332,696 | 6,251,418,013 | 6,251,418,013 |
| 2007 | $1,865,017,722 | 5,947,609,830 | 5,947,609,830 |
| 2008 | $3,144,982,398 | 6,299,599,641 | 6,299,599,641 |
| 2009 | $1,089,647,934 | 3,158,236,526 | 3,158,236,526 |
| 2010 | $971,091,130 | 2,308,936,962 | 2,308,936,962 |
| 2011 | $1,598,803,965 | 3,236,763,704 | 3,236,763,704 |
Note: Quantity represents Weight in kilograms
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