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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $4,928,861,812 | 12,941,851,100 | 12,941,851,100 |
| 2006 | $6,333,862,823 | 13,479,582,132 | 13,479,582,132 |
| 2007 | $6,462,747,437 | 12,385,102,071 | 12,385,102,071 |
| 2008 | $8,881,842,972 | 12,233,713,668 | 12,233,713,668 |
| 2009 | $4,733,236,015 | 10,503,754,537 | 10,503,754,537 |
| 2010 | $6,649,521,218 | 11,251,958,346 | 11,251,958,346 |
| 2011 | $8,448,644,069 | 10,152,746,800 | 10,152,746,800 |
Note: Quantity represents Weight in kilograms
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