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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,605,988,278 | 9,231,518 | 9,231,518 |
| 2006 | $1,408,637,705 | 7,852,451 | 7,852,451 |
| 2007 | $1,085,987,105 | 4,570,852 | 4,570,852 |
| 2008 | $963,528,227 | 4,015,832 | 4,015,832 |
| 2009 | $901,952,588 | 3,816,884 | 3,816,884 |
| 2010 | $965,184,511 | 3,442,494 | 3,442,494 |
| 2011 | $964,705,837 | 3,490,203 | 3,490,203 |
Note: Quantity represents Weight in kilograms
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