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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,011,809,200 | 7,074,449,722 | 7,074,449,722 |
| 2006 | $1,015,413,500 | 6,576,105,969 | 6,576,105,969 |
| 2007 | $1,349,321,900 | 7,218,848,754 | 7,218,848,754 |
| 2008 | $3,373,710,200 | 6,316,614,593 | 6,316,614,593 |
| 2009 | $1,357,869,500 | 2,911,929,166 | 2,911,929,166 |
| 2010 | $2,225,640,500 | 6,946,793,386 | 6,946,793,386 |
| 2011 | $3,351,379,400 | 7,803,511,369 | 7,803,511,369 |
Note: Quantity represents Weight in kilograms
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