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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $5,908,595,992 | 1,176,542,412 | 1,176,542,412 |
| 2006 | $6,104,235,079 | 1,011,653,296 | 1,011,653,296 |
| 2007 | $6,360,960,493 | 982,683,922 | 982,683,922 |
| 2008 | $5,619,963,946 | 848,189,526 | 848,189,526 |
| 2009 | $4,104,259,613 | 527,173,417 | 527,173,417 |
| 2010 | $6,544,524,441 | 853,787,702 | 853,787,702 |
| 2011 | $7,271,329,083 | 1,002,216,660 | 1,002,216,660 |
Note: Quantity represents Weight in kilograms
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