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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $12,850,553,447 | 130,150,141 | 130,150,141 |
| 2006 | $15,371,859,357 | 145,833,854 | 145,833,854 |
| 2007 | $10,481,882,903 | 94,721,315 | 94,721,315 |
| 2008 | $9,266,525,121 | 81,469,158 | 81,469,158 |
| 2009 | $7,635,432,057 | 63,848,641 | 63,848,641 |
| 2010 | $8,281,999,706 | 72,445,776 | 72,445,776 |
Note: Quantity represents Weight in kilograms
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