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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $650,888,280 | 2,287,412,400 | 2,287,412,400 |
| 2006 | $625,203,767 | 1,770,626,800 | 1,770,626,800 |
| 2007 | $621,364,476 | 1,702,974,700 | 1,702,974,700 |
| 2008 | $1,143,807,777 | 4,520,935,423 | 4,520,935,423 |
| 2009 | $597,720,541 | 1,714,317,500 | 1,714,317,500 |
| 2010 | $737,445,128 | 1,788,993,887 | 1,788,993,887 |
| 2011 | $781,777,151 | 1,405,777,969 | 1,405,777,969 |
Note: Quantity represents Weight in kilograms
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