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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $6,889,893,097 | 18,926,137,758 | 18,926,137,758 |
| 2006 | $8,349,523,104 | 18,370,719,960 | 18,370,719,960 |
| 2007 | $8,326,398,455 | 16,938,848,589 | 16,938,848,589 |
| 2008 | $11,644,524,483 | 15,762,690,472 | 15,762,690,472 |
| 2009 | $6,250,898,108 | 14,922,823,516 | 14,922,823,516 |
| 2010 | $11,075,404,946 | 19,401,206,638 | 19,401,206,638 |
| 2011 | $10,016,056,966 | 13,010,824,795 | 13,010,824,795 |
Note: Quantity represents Weight in kilograms
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