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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $3,684,800,875 | 401,753,932 | 401,753,932 |
| 2006 | $4,397,697,518 | 479,481,070 | 479,481,070 |
| 2007 | $3,925,266,216 | 400,812,570 | 400,812,570 |
| 2008 | $3,116,280,665 | 267,040,199 | 267,040,199 |
| 2009 | $2,166,604,171 | 166,375,532 | 166,375,532 |
| 2010 | $3,032,920,998 | 241,268,906 | 241,268,906 |
| 2011 | $3,238,102,554 | 252,991,042 | 252,991,042 |
Note: Quantity represents Weight in kilograms
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