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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $6,474,153,450 | 18,100,794,679 | 18,100,794,679 |
| 2006 | $9,487,457,228 | 21,714,869,507 | 21,714,869,507 |
| 2007 | $10,917,941,061 | 22,090,005,560 | 22,090,005,560 |
| 2008 | $14,957,218,522 | 21,067,515,723 | 21,067,515,723 |
| 2009 | $10,294,417,989 | 25,039,926,688 | 25,039,926,688 |
| 2010 | $11,199,483,000 | 19,254,421,155 | 19,254,421,155 |
| 2011 | $14,085,616,339 | 17,833,925,944 | 17,833,925,944 |
Note: Quantity represents Weight in kilograms
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