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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $8,590,033,634 | 174,567,750 | 174,567,750 |
| 2006 | $10,962,421,848 | 207,754,852 | 207,754,852 |
| 2007 | $10,983,014,229 | 193,660,672 | 193,660,672 |
| 2008 | $10,842,359,425 | 187,112,659 | 187,112,659 |
| 2009 | $9,113,999,724 | 1,902,823,083 | 1,902,823,083 |
| 2010 | $10,613,404,183 | 85,903,110,734 | 85,903,110,734 |
| 2011 | $6,182,563,263 | 176,358,892 | 176,358,892 |
Note: Quantity represents Weight in kilograms
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