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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $915,712,705 | 5,632,523,811 | 5,632,523,811 |
| 2006 | $963,583,330 | 5,810,450,744 | 5,810,450,744 |
| 2007 | $1,562,494,082 | 5,900,331,945 | 5,900,331,945 |
| 2008 | $2,108,357,943 | 4,073,313,052 | 4,073,313,052 |
| 2009 | $1,539,390,139 | 3,974,182,235 | 3,974,182,235 |
| 2010 | $2,140,801,938 | 9,726,786,051 | 9,726,786,051 |
| 2011 | $2,836,590,140 | 10,498,724,717 | 10,498,724,717 |
Note: Quantity represents Weight in kilograms
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