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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $506,007,314 | 1,315,333,431 | 1,315,333,431 |
| 2006 | $1,310,329,295 | 3,080,068,545 | 3,080,068,545 |
| 2007 | $1,035,424,094 | 2,073,532,825 | 2,073,532,825 |
| 2008 | $1,524,512,776 | 2,440,109,831 | 2,440,109,831 |
| 2009 | $1,141,077,248 | 2,723,772,989 | 2,723,772,989 |
| 2010 | $1,091,339,773 | 2,035,986,257 | 2,035,986,257 |
| 2011 | $1,306,010,039 | 1,759,107,424 | 1,759,107,424 |
Note: Quantity represents Weight in kilograms
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