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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,946,567,174 | 48,658,476 | 48,658,476 |
| 2006 | $1,556,234,304 | 38,335,853 | 38,335,853 |
| 2007 | $882,627,344 | 24,919,707 | 24,919,707 |
| 2008 | $737,380,673 | 28,977,601 | 28,977,601 |
| 2009 | $352,104,168 | 11,118,783 | 11,118,783 |
| 2010 | $480,048,783 | 0 | 0 |
| 2011 | $407,436,957 | 0 | 0 |
Note: Quantity represents Weight in kilograms
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