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| Year | Trade Value | Weight (kg) | Quantity |
| 2006 | $256,814,332 | 1,172,696,272 | 1,172,696,272 |
| 2007 | $1,264,794,029 | 4,957,976,302 | 4,957,976,302 |
| 2008 | $265,848,321 | 721,533,000 | 721,533,000 |
| 2009 | $2,634,880 | 9,125,666 | 9,125,666 |
| 2010 | $76,066,708 | 248,142,968 | 248,142,968 |
| 2011 | $7,331 | 24,980 | 24,980 |
Note: Quantity represents Weight in kilograms
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