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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $8,792,306,294 | 1,315,819,559 | 1,315,819,559 |
| 2006 | $8,842,684,672 | 1,008,103,349 | 1,008,103,349 |
| 2007 | $8,478,035,156 | 1,003,932,052 | 1,003,932,052 |
| 2008 | $7,084,287,189 | 852,570,411 | 852,570,411 |
| 2009 | $5,107,988,272 | 462,927,542 | 462,927,542 |
| 2010 | $7,937,783,672 | 737,347,223 | 737,347,223 |
| 2011 | $9,192,303,763 | 893,817,113 | 893,817,113 |
Note: Quantity represents Weight in kilograms
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