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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,020,072,460 | 3,271,565,688 | 3,271,565,688 |
| 2006 | $790,984,986 | 2,445,528,345 | 2,445,528,345 |
| 2007 | $1,026,229,862 | 2,268,228,017 | 2,268,228,017 |
| 2008 | $2,211,460,770 | 3,347,881,554 | 3,347,881,554 |
| 2009 | $1,253,364,839 | 3,850,905,869 | 3,850,905,869 |
| 2010 | $1,216,687,578 | 3,003,267,132 | 3,003,267,132 |
| 2011 | $1,097,253,044 | 1,867,214,685 | 1,867,214,685 |
Note: Quantity represents Weight in kilograms
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