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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,809,705,968 | 11,390,296,507 | 11,390,296,507 |
| 2006 | $1,572,389,200 | 8,447,937,820 | 8,447,937,820 |
| 2007 | $1,487,306,237 | 6,680,808,448 | 6,680,808,448 |
| 2008 | $1,651,531,979 | 4,978,459,588 | 4,978,459,588 |
| 2009 | $398,694,516 | 1,855,269,070 | 1,855,269,070 |
| 2010 | $885,522,755 | 3,472,956,987 | 3,472,956,987 |
| 2011 | $1,114,624,101 | 3,843,914,054 | 3,843,914,054 |
Note: Quantity represents Weight in kilograms
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