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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $491,912,723 | 4,299,832,976 | 4,299,832,976 |
| 2006 | $634,810,615 | 4,494,882,336 | 4,494,882,336 |
| 2007 | $454,771,417 | 2,111,238,604 | 2,111,238,604 |
| 2008 | $349,067,357 | 625,186,465 | 625,186,465 |
| 2009 | $456,059,168 | 701,937,738 | 701,937,738 |
| 2010 | $215,825,027 | 367,111,146 | 367,111,146 |
| 2011 | $130,650,372 | 149,254,869 | 149,254,869 |
Note: Quantity represents Weight in kilograms
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