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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,421,942,707 | 16,086,883,900 | 16,086,883,900 |
| 2006 | $1,548,593,887 | 16,125,873,300 | 16,125,873,300 |
| 2007 | $1,414,864,868 | 14,292,459,900 | 14,292,459,900 |
| 2008 | $3,050,610,759 | 18,256,927,300 | 18,256,927,300 |
| 2009 | $1,890,889,886 | 13,684,723,800 | 13,684,723,800 |
| 2010 | $2,407,562,360 | 16,383,800,700 | 16,383,800,700 |
| 2011 | $2,415,015,302 | 13,775,026,600 | 13,775,026,600 |
Note: Quantity represents Weight in kilograms
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